Module:Citation/CS1

Documentation for this module may be created at Module:Citation/CS1/doc

 require('Module:No globals'); --[[--------------------------< F O R W A R D D E C L A R A T I O N S >-------------------------------------- each of these counts against the Lua upvalue limit ]] local validation;	-- functions in Module:Citation/CS1/Date_validation local utilities;	-- functions in Module:Citation/CS1/Utilities local z ={};	-- table of tables in Module:Citation/CS1/Utilities local identifiers;	-- functions and tables in Module:Citation/CS1/Identifiers local metadata;	-- functions in Module:Citation/CS1/COinS local cfg = {};	-- table of configuration tables that are defined in Module:Citation/CS1/Configuration local whitelist = {};	-- table of tables listing valid template parameter names; defined in Module:Citation/CS1/Whitelist --[[--------------------------< P A G E S C O P E V A R I A B L E S >-------------------------------------- declare variables here that have page-wide scope that are not brought in from other modules; that are created here and used here ]] local added_deprecated_cat;	-- Boolean flag so that the category is added only once local added_vanc_errs;	-- Boolean flag so we only emit one Vancouver error / category local Frame;	-- holds the module's frame table --[[--------------------------< F I R S T _ S E T >------------------------------------------------------------ Locates and returns the first set value in a table of values where the order established in the table, left-to-right (or top-to-bottom), is the order in which the values are evaluated. Returns nil if none are set. This version replaces the original 'for _, val in pairs do' and a similar version that used ipairs. With the pairs version the order of evaluation could not be guaranteed. With the ipairs version, a nil value would terminate the for-loop before it reached the actual end of the list. ]] local function first_set (list, count)	local i = 1;	while i <= count do	-- loop through all items in list	if utilities.is_set( list[i] ) then	return list[i];	-- return the first set list member	end	i = i + 1;	-- point to next	end end --[[--------------------------< A D D _ V A N C _ E R R O R >---------------------------------------------------- Adds a single Vancouver system error message to the template's output regardless of how many error actually exist. To prevent duplication, added_vanc_errs is nil until an error message is emitted. added_vanc_errs is a Boolean declared in page scope variables above ]] local function add_vanc_error (source)	if not added_vanc_errs then	added_vanc_errs = true;	-- note that we've added this category	table.insert( z.message_tail, { utilities.set_message ( 'err_vancouver', {source}, true ) } );	end end --[[--------------------------< I S _ S C H E M E >------------------------------------------------------------ does this thing that purports to be a URI scheme seem to be a valid scheme? The scheme is checked to see if it is in agreement with http://tools.ietf.org/html/std66#section-3.1 which says:	Scheme names consist of a sequence of characters beginning with a letter and followed by any combination of letters, digits, plus ("+"), period ("."), or hyphen ("-"). returns true if it does, else false ]] local function is_scheme (scheme)	return scheme and scheme:match ('^%a[%a%d%+%.%-]*:');	-- true if scheme is set and matches the pattern end --[=[-------------------------< I S _ D O M A I N _ N A M E >-------------------------------------------------- Does this thing that purports to be a domain name seem to be a valid domain name? Syntax defined here: http://tools.ietf.org/html/rfc1034#section-3.5 BNF defined here: https://tools.ietf.org/html/rfc4234 Single character names are generally reserved; see https://tools.ietf.org/html/draft-ietf-dnsind-iana-dns-01#page-15;	see also [[Single-letter second-level domain]] list of TLDs: https://www.iana.org/domains/root/db RFC 952 (modified by RFC 1123) requires the first and last character of a hostname to be a letter or a digit. Between the first and last characters the name may use letters, digits, and the hyphen. Also allowed are IPv4 addresses. IPv6 not supported domain is expected to be stripped of any path so that the last character in the last character of the TLD. tld is two or more alpha characters. Any preceding '//' (from splitting a URL with a scheme) will be stripped here. Perhaps not necessary but retained in case it is necessary for IPv4 dot decimal. There are several tests:	the first character of the whole domain name including subdomains must be a letter or a digit	internationalized domain name (ASCII characters with .xn-- ASCII Compatible Encoding (ACE) prefix xn-- in the TLD) see https://tools.ietf.org/html/rfc3490	single-letter/digit second-level domains in the .org, .cash, and .today TLDs	q, x, and z SL domains in the .com TLD	i and q SL domains in the .net TLD	single-letter SL domains in the ccTLDs (where the ccTLD is two letters)	two-character SL domains in gTLDs (where the gTLD is two or more letters)	three-plus-character SL domains in gTLDs (where the gTLD is two or more letters)	IPv4 dot-decimal address format; TLD not allowed returns true if domain appears to be a proper name and TLD or IPv4 address, else false ]=] local function is_domain_name (domain)	if not domain then	return false;	-- if not set, abandon	end	domain = domain:gsub ('^//', '');	-- strip '//' from domain name if present; done here so we only have to do it once	if not domain:match ('^[%w]') then	-- first character must be letter or digit	return false;	end	if domain:match ('^%a+:') then	-- hack to detect things that look like s:Page:Title where Page: is namespace at Wikisource	return false;	end	local patterns = {	-- patterns that look like URLs	'%f[%w][%w][%w%-]+[%w]%.%a%a+$',	-- three or more character hostname.hostname or hostname.tld	'%f[%w][%w][%w%-]+[%w]%.xn%-%-[%w]+$',	-- internationalized domain name with ACE prefix	'%f[%a][qxz]%.com$',	-- assigned one character .com hostname (x.com times out 2015-12-10)	'%f[%a][iq]%.net$',	-- assigned one character .net hostname (q.net registered but not active 2015-12-10)	'%f[%w][%w]%.%a%a$',	-- one character hostname and ccTLD (2 chars)	'%f[%w][%w][%w]%.%a%a+$',	-- two character hostname and TLD	'^%d%d?%d?%.%d%d?%d?%.%d%d?%d?%.%d%d?%d?',	-- IPv4 address	}	for _, pattern in ipairs (patterns) do	-- loop through the patterns list	if domain:match (pattern) then	return true;	-- if a match then we think that this thing that purports to be a URL is a URL	end	end	for _, d in ipairs ({'cash', 'company', 'today', 'org'}) do	-- look for single letter second level domain names for these top level domains	if domain:match ('%f[%w][%w]%.' .. d) then	return true	end	end	return false;	-- no matches, we don't know what this thing is end --[[--------------------------< I S _ U R L >------------------------------------------------------------------ returns true if the scheme and domain parts of a URL appear to be a valid URL; else false. This function is the last step in the validation process. This function is separate because there are cases that are not covered by split_url(), for example is_parameter_ext_wikilink() which is looking for bracketted external wikilinks. ]] local function is_url (scheme, domain)	if utilities.is_set (scheme) then	-- if scheme is set check it and domain	return is_scheme (scheme) and is_domain_name (domain);	else	return is_domain_name (domain);	-- scheme not set when URL is protocol-relative	end end --[[--------------------------< S P L I T _ U R L >------------------------------------------------------------ Split a URL into a scheme, authority indicator, and domain. First remove Fully Qualified Domain Name terminator (a dot following TLD) (if any) and any path(/), query(?) or fragment(#). If protocol-relative URL, return nil scheme and domain else return nil for both scheme and domain. When not protocol-relative, get scheme, authority indicator, and domain. If there is an authority indicator (one or more '/' characters immediately following the scheme's colon), make sure that there are only 2. Any URL that does not have news: scheme must have authority indicator (//). TODO: are there other common schemes like news: that don't use authority indicator? Strip off any port and path; ]] local function split_url (url_str)	local scheme, authority, domain;	url_str = url_str:gsub ('([%a%d])%.?[/%?#].*$', '%1');	-- strip FQDN terminator and path(/), query(?), fragment (#) (the capture prevents false replacement of '//')	if url_str:match ('^//%S*') then	-- if there is what appears to be a protocol-relative URL	domain = url_str:match ('^//(%S*)')	elseif url_str:match ('%S-:/*%S+') then	-- if there is what appears to be a scheme, optional authority indicator, and domain name	scheme, authority, domain = url_str:match ('(%S-:)(/*)(%S+)');	-- extract the scheme, authority indicator, and domain portions	if utilities.is_set (authority) then	authority = authority:gsub ('//', '', 1);	-- replace place 1 pair of '/' with nothing;	if utilities.is_set(authority) then	-- if anything left (1 or 3+ '/' where authority should be) then	return scheme;	-- return scheme only making domain nil which will cause an error message	end	else	if not scheme:match ('^news:') then	-- except for news:..., MediaWiki won't link URLs that do not have authority indicator; TODO: a better way to do this test?	return scheme;	-- return scheme only making domain nil which will cause an error message	end	end	domain = domain:gsub ('(%a):%d+', '%1');	-- strip port number if present	end	return scheme, domain; end --[[--------------------------< L I N K _ P A R A M _ O K >--------------------------------------------------- checks the content of |title-link=, |series-link=, |author-link=, etc. for properly formatted content: no wikilinks, no URLs Link parameters are to hold the title of a Wikipedia article, so none of the WP:TITLESPECIALCHARACTERS are allowed:	# < > [ ] | { } _ except the underscore which is used as a space in wiki URLs and # which is used for section links returns false when the value contains any of these characters. When there are no illegal characters, this function returns TRUE if value DOES NOT appear to be a valid URL (the |<param>-link= parameter is ok); else false when value appears to be a valid URL (the |<param>-link= parameter is NOT ok). ]] local function link_param_ok (value)	local scheme, domain;	if value:find ('[<>%[%]|{}]') then	-- if any prohibited characters	return false;	end	scheme, domain = split_url (value);	-- get scheme or nil and domain or nil from URL;	return not is_url (scheme, domain);	-- return true if value DOES NOT appear to be a valid URL end --[[--------------------------< L I N K _ T I T L E _ O K >--------------------------------------------------- Use link_param_ok() to validate |<param>-link= value and its matching |<title>= value. |<title>= may be wiki-linked but not when |<param>-link= has a value. This function emits an error message when that condition exists check <link> for inter-language interwiki-link prefix. prefix must be a MediaWiki-recognized language code and must begin with a colon. ]] local function link_title_ok (link, lorig, title, torig) local orig;	if utilities.is_set (link) then	-- don't bother if <param>-link doesn't have a value	if not link_param_ok (link) then	-- check |<param>-link= markup	orig = lorig;	-- identify the failing link parameter	elseif title:find ('%[%[') then	-- check |title= for wikilink markup	orig = torig;	-- identify the failing |title= parameter	elseif link:match ('^%a+:') then	-- if the link is what looks like an interwiki	local prefix = link:match ('^(%a+):'):lower();	-- get the interwiki prefix	if cfg.inter_wiki_map[prefix] then	-- if prefix is in the map, must have preceding colon	orig = lorig;	-- flag as error	end	end	end	if utilities.is_set (orig) then	link = '';	-- unset	table.insert( z.message_tail, { utilities.set_message ( 'err_bad_paramlink', orig)});	-- URL or wikilink in |title= with |title-link=;	end	return link;	-- link if ok, empty string else end --[[--------------------------< C H E C K _ U R L >------------------------------------------------------------ Determines whether a URL string appears to be valid. First we test for space characters. If any are found, return false. Then split the URL into scheme and domain portions, or for protocol-relative (//example.com) URLs, just the domain. Use is_url() to validate the two portions of the URL. If both are valid, or for protocol-relative if domain is valid, return true, else false. Because it is different from a standard URL, and because this module used external_link() to make external links that work for standard and news: links, we validate newsgroup names here. The specification for a newsgroup name is at https://tools.ietf.org/html/rfc5536#section-3.1.4 ]] local function check_url( url_str )	if nil == url_str:match ("^%S+$") then	-- if there are any spaces in |url=value it can't be a proper URL	return false;	end	local scheme, domain;	scheme, domain = split_url (url_str);	-- get scheme or nil and domain or nil from URL;	if 'news:' == scheme then	-- special case for newsgroups	return domain:match('^[%a%d%+%-_]+%.[%a%d%+%-_%.]*[%a%d%+%-_]$');	end	return is_url (scheme, domain);	-- return true if value appears to be a valid URL end --[=[-------------------------< I S _ P A R A M E T E R _ E X T _ W I K I L I N K >---------------------------- Return true if a parameter value has a string that begins and ends with square brackets [ and ] and the first non-space characters following the opening bracket appear to be a URL. The test will also find external wikilinks that use protocol-relative URLs. Also finds bare URLs. The frontier pattern prevents a match on interwiki-links which are similar to scheme:path URLs. The tests that find bracketed URLs are required because the parameters that call this test (currently |title=, |chapter=, |work=, and |publisher=) may have wikilinks and there are articles or redirects like '//Hus' so, while uncommon, |title=[[//Hus]] is possible as might be [[en://Hus]]. ]=] local function is_parameter_ext_wikilink (value) local scheme, domain;	if value:match ('%f[%[]%[%a%S*:%S+.*%]') then	-- if ext. wikilink with scheme and domain: [xxxx://yyyyy.zzz]	scheme, domain = split_url (value:match ('%f[%[]%[(%a%S*:%S+).*%]'));	elseif value:match ('%f[%[]%[//%S+.*%]') then	-- if protocol-relative ext. wikilink: [//yyyyy.zzz]	scheme, domain = split_url (value:match ('%f[%[]%[(//%S+).*%]'));	elseif value:match ('%a%S*:%S+') then	-- if bare URL with scheme; may have leading or trailing plain text	scheme, domain = split_url (value:match ('(%a%S*:%S+)'));	elseif value:match ('//%S+') then	-- if protocol-relative bare URL: //yyyyy.zzz; may have leading or trailing plain text	scheme, domain = split_url (value:match ('(//%S+)'));	-- what is left should be the domain	else	return false;	-- didn't find anything that is obviously a URL	end	return is_url (scheme, domain);	-- return true if value appears to be a valid URL end --[[-------------------------< C H E C K _ F O R _ U R L >----------------------------------------------------- loop through a list of parameters and their values. Look at the value and if it has an external link, emit an error message. ]] local function check_for_url (parameter_list) local error_message = '';	for k, v in pairs (parameter_list) do	-- for each parameter in the list	if is_parameter_ext_wikilink (v) then	-- look at the value; if there is a URL add an error message	if utilities.is_set(error_message) then	-- once we've added the first portion of the error message ...	error_message = error_message .. ", ";	-- ... add a comma space separator	end	error_message = error_message .. "&#124;" .. k .. "=";	-- add the failed parameter	end	end	if utilities.is_set (error_message) then	-- done looping, if there is an error message, display it	table.insert( z.message_tail, { utilities.set_message ( 'err_param_has_ext_link', {error_message}, true ) } );	end end --[[--------------------------< S A F E _ F O R _ U R L >------------------------------------------------------ Escape sequences for content that will be used for URL descriptions ]] local function safe_for_url( str )	if str:match( "%[%[.-%]%]" ) ~= nil then	table.insert( z.message_tail, { utilities.set_message ( 'err_wikilink_in_url', {}, true ) } );	end	return str:gsub( '[%[%]\n]', {	['['] = '&#91;',	[']'] = '&#93;',	['\n'] = ' ' } ); end --[[--------------------------< E X T E R N A L _ L I N K >---------------------------------------------------- Format an external link with error checking ]] local function external_link( URL, label, source, access)	local error_str = "";	local domain;	local path;	local base_url;	if not utilities.is_set ( label ) then	label = URL;	if utilities.is_set ( source ) then	error_str = utilities.set_message ( 'err_bare_url_missing_title', { utilities.wrap_style ('parameter', source) }, false, " " );	else	error( cfg.messages["bare_url_no_origin"] );	end	end	if not check_url( URL ) then	error_str = utilities.set_message ( 'err_bad_url', {utilities.wrap_style ('parameter', source)}, false, " " ) .. error_str;	end	domain, path = URL:match ('^([/%.%-%+:%a%d]+)([/%?#].*)$');	-- split the URL into scheme plus domain and path	if path then	-- if there is a path portion	path = path:gsub ('[%[%]]', {['['] = '%5b', [']'] = '%5d'});	-- replace '[' and ']' with their percent-encoded values	URL = table.concat ({domain, path});	-- and reassemble	end	base_url = table.concat({ "[", URL, " ", safe_for_url (label), "]" });	-- assemble a wiki-markup URL	if utilities.is_set (access) then	-- access level (subscription, registration, limited)	base_url = utilities.substitute (cfg.presentation['ext-link-access-signal'], {cfg.presentation[access].class, cfg.presentation[access].title, base_url});	-- add the appropriate icon	end	return table.concat ({base_url, error_str}); end --[[--------------------------< D E P R E C A T E D _ P A R A M E T E R >-------------------------------------- Categorize and emit an error message when the citation contains one or more deprecated parameters. The function includes the offending parameter name to the error message. Only one error message is emitted regardless of the number of deprecated parameters in the citation. added_deprecated_cat is a Boolean declared in page scope variables above ]] local function deprecated_parameter(name)	if not added_deprecated_cat then	added_deprecated_cat = true;	-- note that we've added this category	table.insert( z.message_tail, { utilities.set_message ( 'err_deprecated_params', {name}, true ) } );	-- add error message	end end --[=[-------------------------< K E R N _ Q U O T E S >-------------------------------------------------------- Apply kerning to open the space between the quote mark provided by the module and a leading or trailing quote mark contained in a |title= or |chapter= parameter's value. This function will positive kern either single or double quotes:	"'Unkerned title with leading and trailing single quote marks'"	" 'Kerned title with leading and trailing single quote marks' " (in real life the kerning isn't as wide as this example) Double single quotes (italic or bold wiki-markup) are not kerned. Replaces Unicode quote marks in plain text or in the label portion of a [[L|D]] style wikilink with typewriter quote marks regardless of the need for kerning. Unicode quote marks are not replaced in simple [[D]] wikilinks. Call this function for chapter titles, for website titles, etc.; not for book titles. ]=] local function kern_quotes (str)	local cap = '';	local cap2 = '';	local wl_type, label, link;	wl_type, label, link = utilities.is_wikilink (str);	-- wl_type is: 0, no wl (text in label variable); 1, [[D]]; 2, [[L|D]]	if 1 == wl_type then	-- [[D]] simple wikilink with or without quote marks	if mw.ustring.match (str, '%[%[[\"“”\'‘’].+[\"“”\'‘’]%]%]') then	-- leading and trailing quote marks	str = utilities.substitute (cfg.presentation['kern-wl-both'], str);	elseif mw.ustring.match (str, '%[%[[\"“”\'‘’].+%]%]')	then	-- leading quote marks	str = utilities.substitute (cfg.presentation['kern-wl-left'], str);	elseif mw.ustring.match (str, '%[%[.+[\"“”\'‘’]%]%]') then	-- trailing quote marks	str = utilities.substitute (cfg.presentation['kern-wl-right'], str);	end	else	-- plain text or [[L|D]]; text in label variable	label = mw.ustring.gsub (label, '[“”]', '\"');	-- replace “” (U+201C & U+201D) with " (typewriter double quote mark)	label = mw.ustring.gsub (label, '[‘’]', '\'');	-- replace ‘’ (U+2018 & U+2019) with ' (typewriter single quote mark)	cap, cap2 = mw.ustring.match (label, "^([\"\'])([^\'].+)");	-- match leading double or single quote but not doubled single quotes (italic markup)	if utilities.is_set (cap) then	label = utilities.substitute (cfg.presentation['kern-left'], {cap, cap2});	end	cap, cap2 = mw.ustring.match (label, "^(.+[^\'])([\"\'])$")	-- match trailing double or single quote but not doubled single quotes (italic markup)	if utilities.is_set (cap) then	label = utilities.substitute (cfg.presentation['kern-right'], {cap, cap2});	end	if 2 == wl_type then	str = utilities.make_wikilink (link, label);	-- reassemble the wikilink	else	str = label;	end	end	return str; end --[[--------------------------< F O R M A T _ S C R I P T _ V A L U E >---------------------------------------- |script-title= holds title parameters that are not written in Latin-based scripts: Chinese, Japanese, Arabic, Hebrew, etc. These scripts should not be italicized and may be written right-to-left. The value supplied by |script-title= is concatenated onto Title after Title has been wrapped in italic markup. Regardless of language, all values provided by |script-title= are wrapped in <bdi>...</bdi> tags to isolate RTL languages from the English left to right. |script-title= provides a unique feature. The value in |script-title= may be prefixed with a two-character ISO 639-1 language code and a colon:	|script-title=ja:*** *** (where * represents a Japanese character) Spaces between the two-character code and the colon and the colon and the first script character are allowed:	|script-title=ja : *** ***	|script-title=ja: *** ***	|script-title=ja :*** *** Spaces preceding the prefix are allowed: |script-title = ja:*** *** The prefix is checked for validity. If it is a valid ISO 639-1 language code, the lang attribute (lang="ja") is added to the <bdi> tag so that browsers can know the language the tag contains. This may help the browser render the script more correctly. If the prefix is invalid, the lang attribute is not added. At this time there is no error message for this condition. Supports |script-title=, |script-chapter=, |script-<periodical>= ]] local function format_script_value (script_value, script_param)	local lang='';	-- initialize to empty string	local name;	if script_value:match('^%l%l%l?%s*:') then	-- if first 3 or 4 non-space characters are script language prefix	lang = script_value:match('^(%l%l%l?)%s*:%s*%S.*');	-- get the language prefix or nil if there is no script	if not utilities.is_set (lang) then	table.insert( z.message_tail, { utilities.set_message ( 'err_script_parameter', {script_param, 'missing title part'}, true ) } );	-- prefix without 'title'; add error message	return '';	-- script_value was just the prefix so return empty string	end	-- if we get this far we have prefix and script	name = cfg.lang_code_remap[lang] or mw.language.fetchLanguageName( lang, cfg.this_wiki_code );	-- get language name so that we can use it to categorize	if utilities.is_set (name) then	-- is prefix a proper ISO 639-1 language code?	script_value = script_value:gsub ('^%l+%s*:%s*', '');	-- strip prefix from script	-- is prefix one of these language codes?	if utilities.in_array (lang, cfg.script_lang_codes) then	utilities.add_prop_cat ('script_with_name', {name, lang})	else	table.insert( z.message_tail, { utilities.set_message ( 'err_script_parameter', {script_param, 'unknown language code'}, true ) } );	-- unknown script-language; add error message	end	lang = ' lang="' .. lang .. '" ';	-- convert prefix into a lang attribute	else	table.insert( z.message_tail, { utilities.set_message ( 'err_script_parameter', {script_param, 'invalid language code'}, true ) } );	-- invalid language code; add error message	lang = '';	-- invalid so set lang to empty string	end	else	table.insert( z.message_tail, { utilities.set_message ( 'err_script_parameter', {script_param, 'missing prefix'}, true ) } );	-- no language code prefix; add error message	end	script_value = utilities.substitute (cfg.presentation['bdi'], {lang, script_value});	-- isolate in case script is RTL	return script_value; end --[[--------------------------< S C R I P T _ C O N C A T E N A T E >------------------------------------------ Initially for |title= and |script-title=, this function concatenates those two parameter values after the script value has been wrapped in <bdi> tags. ]] local function script_concatenate (title, script, script_param)	if utilities.is_set (script) then	script = format_script_value (script, script_param);	-- <bdi> tags, lang attribute, categorization, etc.; returns empty string on error	if utilities.is_set (script) then	title = title .. ' ' .. script;	-- concatenate title and script title	end	end	return title; end --[[--------------------------< W R A P _ M S G >-------------------------------------------------------------- Applies additional message text to various parameter values. Supplied string is wrapped using a message_list configuration taking one argument. Supports lower case text for {{citation}} templates. Additional text taken from citation_config.messages - the reason this function is similar to but separate from wrap_style(). ]] local function wrap_msg (key, str, lower)	if not utilities.is_set ( str ) then	return "";	end	if true == lower then	local msg;	msg = cfg.messages[key]:lower();	-- set the message to lower case before	return utilities.substitute ( msg, str );	-- including template text	else	return utilities.substitute ( cfg.messages[key], str );	end end --[[--------------------------< W I K I S O U R C E _ U R L _ M A K E >---------------------------------------- Makes a Wikisource URL from Wikisource interwiki-link. Returns the URL and appropriate label; nil else. str is the value assigned to |chapter= (or aliases) or |title= or |title-link= ]] local function wikisource_url_make (str)	local wl_type, D, L;	local ws_url, ws_label;	local wikisource_prefix = table.concat ({'https://', cfg.this_wiki_code, '.wikisource.org/wiki/'});	wl_type, D, L = utilities.is_wikilink (str);	-- wl_type is 0 (not a wikilink), 1 (simple wikilink), 2 (complex wikilink)	if 0 == wl_type then	-- not a wikilink; might be from |title-link=	str = D:match ('^[Ww]ikisource:(.+)') or D:match ('^[Ss]:(.+)');	-- article title from interwiki link with long-form or short-form namespace	if utilities.is_set (str) then	ws_url = table.concat ({	-- build a Wikisource URL	wikisource_prefix,	-- prefix	str,	-- article title	});	ws_label = str;	-- label for the URL	end	elseif 1 == wl_type then	-- simple wikilink: [[Wikisource:ws article]]	str = D:match ('^[Ww]ikisource:(.+)') or D:match ('^[Ss]:(.+)');	-- article title from interwiki link with long-form or short-form namespace	if utilities.is_set (str) then	ws_url = table.concat ({	-- build a Wikisource URL	wikisource_prefix,	-- prefix	str,	-- article title	});	ws_label = str;	-- label for the URL	end	elseif 2 == wl_type then	-- non-so-simple wikilink: [[Wikisource:ws article|displayed text]] ([[L|D]])	str = L:match ('^[Ww]ikisource:(.+)') or L:match ('^[Ss]:(.+)');	-- article title from interwiki link with long-form or short-form namespace	if utilities.is_set (str) then	ws_label = D;	-- get ws article name from display portion of interwiki link	ws_url = table.concat ({	-- build a Wikisource URL	wikisource_prefix,	-- prefix	str,	-- article title without namespace from link portion of wikilink	});	end	end	if ws_url then	ws_url = mw.uri.encode (ws_url, 'WIKI');	-- make a usable URL	ws_url = ws_url:gsub ('%%23', '#');	-- undo percent encoding of fragment marker	end	return ws_url, ws_label, L or D;	-- return proper URL or nil and a label or nil end --[[--------------------------< F O R M A T _ P E R I O D I C A L >-------------------------------------------- Format the three periodical parameters: |script-<periodical>=, |<periodical>=, and |trans-<periodical>= into a single Periodical meta- parameter. ]] local function format_periodical (script_periodical, script_periodical_source, periodical, trans_periodical)	local periodical_error = '';	if not utilities.is_set (periodical) then	periodical = '';	-- to be safe for concatenation	else	periodical = utilities.wrap_style ('italic-title', periodical);	-- style	end	periodical = script_concatenate (periodical, script_periodical, script_periodical_source);	-- <bdi> tags, lang attribute, categorization, etc.; must be done after title is wrapped	if utilities.is_set (trans_periodical) then	trans_periodical = utilities.wrap_style ('trans-italic-title', trans_periodical);	if utilities.is_set (periodical) then	periodical = periodical .. ' ' .. trans_periodical;	else	-- here when trans-periodical without periodical or script-periodical	periodical = trans_periodical;	periodical_error = ' ' .. utilities.set_message ('err_trans_missing_title', {'periodical'});	end	end	return periodical .. periodical_error; end --[[--------------------------< F O R M A T _ C H A P T E R _ T I T L E >-------------------------------------- Format the four chapter parameters: |script-chapter=, |chapter=, |trans-chapter=, and |chapter-url= into a single chapter meta- parameter (chapter_url_source used for error messages). ]] local function format_chapter_title (script_chapter, script_chapter_source, chapter, chapter_source, trans_chapter, trans_chapter_source, chapter_url, chapter_url_source, no_quotes, access)	local chapter_error = '';	local ws_url, ws_label, L = wikisource_url_make (chapter);	-- make a wikisource URL and label from a wikisource interwiki link	if ws_url then	ws_label = ws_label:gsub ('_', '');	-- replace underscore separaters with space characters	chapter = ws_label;	end	if not utilities.is_set (chapter) then	chapter = '';	-- to be safe for concatenation	else	if false == no_quotes then	chapter = kern_quotes (chapter);	-- if necessary, separate chapter title's leading and trailing quote marks from module provided quote marks	chapter = utilities.wrap_style ('quoted-title', chapter);	end	end	chapter = script_concatenate (chapter, script_chapter, script_chapter_source);	-- <bdi> tags, lang attribute, categorization, etc.; must be done after title is wrapped	if utilities.is_set (chapter_url) then	chapter = external_link (chapter_url, chapter, chapter_url_source, access);	-- adds bare_url_missing_title error if appropriate	elseif ws_url then	chapter = external_link (ws_url, chapter .. '&nbsp;', 'ws link in chapter');	-- adds bare_url_missing_title error if appropriate; space char to move icon away from chap text; TODO: better way to do this?	chapter = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], L, chapter});	end	if utilities.is_set (trans_chapter) then	trans_chapter = utilities.wrap_style ('trans-quoted-title', trans_chapter);	if utilities.is_set (chapter) then	chapter = chapter .. ' ' .. trans_chapter;	else	-- here when trans_chapter without chapter or script-chapter	chapter = trans_chapter;	chapter_source = trans_chapter_source:match ('trans%-?(.+)');	-- when no chapter, get matching name from trans-<param>	chapter_error = ' ' .. utilities.set_message ('err_trans_missing_title', {chapter_source});	end	end	return chapter .. chapter_error; end --[[--------------------------< H A S _ I N V I S I B L E _ C H A R S >---------------------------------------- This function searches a parameter's value for non-printable or invisible characters. The search stops at the first match. This function will detect the visible replacement character when it is part of the Wikisource. Detects but ignores nowiki and math stripmarkers. Also detects other named stripmarkers (gallery, math, pre, ref) and identifies them with a slightly different error message. See also coins_cleanup(). Output of this function is an error message that identifies the character or the Unicode group, or the stripmarker that was detected along with its position (or, for multi-byte characters, the position of its first byte) in the parameter value. ]] local function has_invisible_chars (param, v)	local position = '';	-- position of invisible char or starting position of stripmarker	local dummy;	-- end of matching string; not used but required to hold end position when a capture is returned	local capture;	-- used by stripmarker detection to hold name of the stripmarker	local i = 1;	local stripmarker, apostrophe;	capture = string.match (v, '[%w%p ]*');	-- test for values that are simple ASCII text and bypass other tests if true	if capture == v then	-- if same there are no Unicode characters	return;	end	while cfg.invisible_chars[i] do	local char = cfg.invisible_chars[i][1]	-- the character or group name	local pattern = cfg.invisible_chars[i][2]	-- the pattern used to find it	position, dummy, capture = mw.ustring.find (v, pattern)	-- see if the parameter value contains characters that match the pattern	if position and (char == 'zero width joiner') then	-- if we found a zero-width joiner character	if mw.ustring.find (v, cfg.indic_script) then	-- it's ok if one of the Indic scripts	position = nil;	-- unset position	end	end	if position then	if 'nowiki' == capture or 'math' == capture or	-- nowiki and math stripmarkers (not an error condition)	('templatestyles' == capture and utilities.in_array (param, {'id', 'quote'})) then	-- templatestyles stripmarker allowed in these parameters	stripmarker = true;	-- set a flag	elseif true == stripmarker and 'delete' == char then	-- because stripmakers begin and end with the delete char, assume that we've found one end of a stripmarker	position = nil;	-- unset	else	local err_msg;	if capture then	err_msg = capture .. ' ' .. char;	else	err_msg = char .. ' ' .. 'character';	end	table.insert( z.message_tail, { utilities.set_message ( 'err_invisible_char', {err_msg, utilities.wrap_style ('parameter', param), position}, true ) } );	-- add error message	return;	-- and done with this parameter	end	end	i = i+1;	-- bump our index	end end --[[--------------------------< A R G U M E N T _ W R A P P E R >---------------------------------------------- Argument wrapper. This function provides support for argument mapping defined in the configuration file so that multiple names can be transparently aliased to single internal variable. ]] local function argument_wrapper ( args )	local origin = {};	return setmetatable({	ORIGIN = function ( self, k )	local dummy = self[k]; --force the variable to be loaded.	return origin[k];	end	},	{	__index = function ( tbl, k )	if origin[k] ~= nil then	return nil;	end	local args, list, v = args, cfg.aliases[k];	if type( list ) == 'table' then	v, origin[k] = utilities.select_one ( args, list, 'err_redundant_parameters' );	if origin[k] == nil then	origin[k] = ''; -- Empty string, not nil	end	elseif list ~= nil then	v, origin[k] = args[list], list;	else	-- maybe let through instead of raising an error?	-- v, origin[k] = args[k], k;	error( cfg.messages['unknown_argument_map'] .. ': ' .. k);	end	-- Empty strings, not nil;	if v == nil then	v = '';	origin[k] = '';	end	tbl = rawset( tbl, k, v );	return v;	end,	}); end --[[--------------------------< N O W R A P _ D A T E >-------------------------------------------------------- When date is YYYY-MM-DD format wrap in nowrap span: <span ...>YYYY-MM-DD</span>. When date is DD MMMM YYYY or is MMMM DD, YYYY then wrap in nowrap span: <span ...>DD MMMM</span> YYYY or <span ...>MMMM DD,</span> YYYY DOES NOT yet support MMMM YYYY or any of the date ranges. ]] local function nowrap_date (date)	local cap = '';	local cap2 = '';	if date:match("^%d%d%d%d%-%d%d%-%d%d$") then	date = utilities.substitute (cfg.presentation['nowrap1'], date);	elseif date:match("^%a+%s*%d%d?,%s+%d%d%d%d$") or date:match ("^%d%d?%s*%a+%s+%d%d%d%d$") then	cap, cap2 = string.match (date, "^(.*)%s+(%d%d%d%d)$");	date = utilities.substitute (cfg.presentation['nowrap2'], {cap, cap2});	end	return date; end --[[--------------------------< S E T _ T I T L E T Y P E >---------------------------------------------------- This function sets default title types (equivalent to the citation including |type=<default value>) for those templates that have defaults. Also handles the special case where it is desirable to omit the title type from the rendered citation (|type=none). ]] local function set_titletype (cite_class, title_type)	if utilities.is_set (title_type) then	if 'none' == cfg.keywords_xlate[title_type] then	title_type = '';	-- if |type=none then type parameter not displayed	end	return title_type;	-- if |type= has been set to any other value use that value	end	return cfg.title_types [cite_class] or '';	-- set template's default title type; else empty string for concatenation end --[[--------------------------< H Y P H E N _ T O _ D A S H >-------------------------------------------------- Converts a hyphen to a dash under certain conditions. The hyphen must separate like items; unlike items are returned unmodified. These forms are modified:	letter - letter (A - B)	digit - digit (4-5)	digit separator digit - digit separator digit (4.1-4.5 or 4-1-4-5)	letterdigit - letterdigit (A1-A5) (an optional separator between letter and digit is supported – a.1-a.5 or a-1-a-5)	digitletter - digitletter (5a - 5d) (an optional separator between letter and digit is supported – 5.a-5.d or 5-a-5-d) any other forms are returned unmodified. str may be a comma- or semicolon-separated list ]] local function hyphen_to_dash( str )	if not utilities.is_set (str) then	return str;	end	local accept;	-- Boolean	str, accept = utilities.has_accept_as_written (str);	-- remove accept-this-as-written markup when it wraps all of str	if accept then	return str;	-- when markup removed, nothing to do, we're done	end	str = str:gsub ('&[nm]dash;', {['&ndash;'] = '–', ['&mdash;'] = '—'});	-- replace &mdash; and &ndash; entities with their characters; semicolon mucks up the text.split	str = str:gsub ('&#45;', '-');	-- replace HTML numeric entity with hyphen character	str = str:gsub ('&nbsp;', ' ');	-- replace &nbsp; entity with generic keyboard space character	local out = {};	local list = mw.text.split (str, '%s*[,;]%s*');	-- split str at comma or semicolon separators if there are any	for _, item in ipairs (list) do	-- for each item in the list	if mw.ustring.match (item, '^%w*[%.%-]?%w+%s*[%-–—]%s*%w*[%.%-]?%w+$') then	-- if a hyphenated range or has endash or emdash separators	if item:match ('^%a+[%.%-]?%d+%s*%-%s*%a+[%.%-]?%d+$') or	-- letterdigit hyphen letterdigit (optional separator between letter and digit)	item:match ('^%d+[%.%-]?%a+%s*%-%s*%d+[%.%-]?%a+$') or	-- digitletter hyphen digitletter (optional separator between digit and letter)	item:match ('^%d+[%.%-]%d+%s*%-%s*%d+[%.%-]%d+$') or	-- digit separator digit hyphen digit separator digit	item:match ('^%d+%s*%-%s*%d+$') or	-- digit hyphen digit	item:match ('^%a+%s*%-%s*%a+$') then	-- letter hyphen letter	item = item:gsub ('(%w*[%.%-]?%w+)%s*%-%s*(%w*[%.%-]?%w+)', '%1–%2');	-- replace hyphen, remove extraneous space characters	else	item = mw.ustring.gsub (item, '%s*[–—]%s*', '–');	-- for endash or emdash separated ranges, replace em with en, remove extraneous whitespace	end	end	item = utilities.has_accept_as_written (item);	-- remove accept-this-as-written markup when it wraps all of str	table.insert (out, item);	-- add the (possibly modified) item to the output table	end	return table.concat (out, ', ');	-- concatenate the output table into a comma separated string end --[[--------------------------< S A F E _ J O I N >------------------------------------------------------------ Joins a sequence of strings together while checking for duplicate separation characters. ]] local function safe_join( tbl, duplicate_char )	local f = {};	-- create a function table appropriate to type of 'duplicate character'	if 1 == #duplicate_char then	-- for single byte ASCII characters use the string library functions	f.gsub = string.gsub	f.match = string.match	f.sub = string.sub	else	-- for multi-byte characters use the ustring library functions	f.gsub = mw.ustring.gsub	f.match = mw.ustring.match	f.sub = mw.ustring.sub	end	local str = '';	-- the output string	local comp = '';	-- what does 'comp' mean?	local end_chr = '';	local trim;	for _, value in ipairs( tbl ) do	if value == nil then value = ''; end	if str == '' then	-- if output string is empty	str = value;	-- assign value to it (first time through the loop)	elseif value ~= '' then	if value:sub(1, 1) == '<' then	-- special case of values enclosed in spans and other markup.	comp = value:gsub( "%b<>", "" );	-- remove HTML markup (<span>string</span> -> string)	else	comp = value;	end	-- typically duplicate_char is sepc	if f.sub(comp, 1, 1) == duplicate_char then	-- is first character same as duplicate_char? why test first character?	-- Because individual string segments often (always?) begin with terminal punct for the	-- preceding segment: 'First element' .. 'sepc next element' .. etc.?	trim = false;	end_chr = f.sub(str, -1, -1);	-- get the last character of the output string	-- str = str .. "<HERE(enchr=" .. end_chr .. ")"	-- debug stuff?	if end_chr == duplicate_char then	-- if same as separator	str = f.sub(str, 1, -2);	-- remove it	elseif end_chr == "'" then	-- if it might be wiki-markup	if f.sub(str, -3, -1) == duplicate_char .. "''" then	-- if last three chars of str are sepc''	str = f.sub(str, 1, -4) .. "''";	-- remove them and add back ''	elseif f.sub(str, -5, -1) == duplicate_char .. "]]''" then	-- if last five chars of str are sepc]]''	trim = true;	-- why? why do this and next differently from previous?	elseif f.sub(str, -4, -1) == duplicate_char .. "]''" then	-- if last four chars of str are sepc]''	trim = true;	-- same question	end	elseif end_chr == "]" then	-- if it might be wiki-markup	if f.sub(str, -3, -1) == duplicate_char .. "]]" then	-- if last three chars of str are sepc]] wikilink	trim = true;	elseif f.sub(str, -3, -1) == duplicate_char .. '"]' then	-- if last three chars of str are sepc"] quoted external link	trim = true;	elseif f.sub(str, -2, -1) == duplicate_char .. "]" then	-- if last two chars of str are sepc] external link	trim = true;	elseif f.sub(str, -4, -1) == duplicate_char .. "'']" then	-- normal case when |url=something & |title=Title.	trim = true;	end	elseif end_chr == " " then	-- if last char of output string is a space	if f.sub(str, -2, -1) == duplicate_char .. " " then	-- if last two chars of str are <sepc><space>	str = f.sub(str, 1, -3);	-- remove them both	end	end	if trim then	if value ~= comp then	-- value does not equal comp when value contains HTML markup	local dup2 = duplicate_char;	if f.match(dup2, "%A" ) then dup2 = "%" .. dup2; end	-- if duplicate_char not a letter then escape it	value = f.gsub(value, "(%b<>)" .. dup2, "%1", 1 )	-- remove duplicate_char if it follows HTML markup	else	value = f.sub(value, 2, -1 );	-- remove duplicate_char when it is first character	end	end	end	str = str .. value;	--add it to the output string	end	end	return str; end --[[--------------------------< I S _ S U F F I X >------------------------------------------------------------ returns true is suffix is properly formed Jr, Sr, or ordinal in the range 1–9. Puncutation not allowed. ]] local function is_suffix (suffix)	if utilities.in_array (suffix, {'Jr', 'Sr', 'Jnr', 'Snr', '1st', '2nd', '3rd'}) or suffix:match ('^%dth$') then	return true;	end	return false; end --[[--------------------------< I S _ G O O D _ V A N C _ N A M E >-------------------------------------------- For Vancouver style, author/editor names are supposed to be rendered in Latin (read ASCII) characters. When a name uses characters that contain diacritical marks, those characters are to converted to the corresponding Latin character. When a name is written using a non-Latin alphabet or logogram, that name is to be transliterated into Latin characters. These things are not currently possible in this module so are left to the editor to do. This test allows |first= and |last= names to contain any of the letters defined in the four Unicode Latin character sets	[http://www.unicode.org/charts/PDF/U0000.pdf C0 Controls and Basic Latin] 0041–005A, 0061–007A	[http://www.unicode.org/charts/PDF/U0080.pdf C1 Controls and Latin-1 Supplement] 00C0–00D6, 00D8–00F6, 00F8–00FF	[http://www.unicode.org/charts/PDF/U0100.pdf Latin Extended-A] 0100–017F	[http://www.unicode.org/charts/PDF/U0180.pdf Latin Extended-B] 0180–01BF, 01C4–024F |lastn= also allowed to contain hyphens, spaces, and apostrophes. (http://www.ncbi.nlm.nih.gov/books/NBK7271/box/A35029/) |firstn= also allowed to contain hyphens, spaces, apostrophes, and periods This original test:	if nil == mw.ustring.find (last, "^[A-Za-zÀ-ÖØ-öø-ƿDŽ-ɏ%-%s%']*$") or nil == mw.ustring.find (first, "^[A-Za-zÀ-ÖØ-öø-ƿDŽ-ɏ%-%s%'%.]+[2-6%a]*$") then was written outside of the code editor and pasted here because the code editor gets confused between character insertion point and cursor position. The test has been rewritten to use decimal character escape sequence for the individual bytes of the Unicode characters so that it is not necessary to use an external editor to maintain this code.	\195\128-\195\150 – À-Ö (U+00C0–U+00D6 – C0 controls)	\195\152-\195\182 – Ø-ö (U+00D8-U+00F6 – C0 controls)	\195\184-\198\191 – ø-ƿ (U+00F8-U+01BF – C0 controls, Latin extended A & B)	\199\132-\201\143 – DŽ-ɏ (U+01C4-U+024F – Latin extended B) ]] local function is_good_vanc_name (last, first, suffix)	if not suffix then	if first:find ('[,%s]') then	-- when there is a space or comma, might be first name/initials + generational suffix	first = first:match ('(.-)[,%s]+');	-- get name/initials	suffix = first:match ('[,%s]+(.+)$');	-- get generational suffix	end	end	if utilities.is_set (suffix) then	if not is_suffix (suffix) then	add_vanc_error (cfg.err_msg_supl.suffix);	return false;	-- not a name with an appropriate suffix	end	end	if nil == mw.ustring.find (last, "^[A-Za-z\195\128-\195\150\195\152-\195\182\195\184-\198\191\199\132-\201\143%-%s%']*$") or	nil == mw.ustring.find (first, "^[A-Za-z\195\128-\195\150\195\152-\195\182\195\184-\198\191\199\132-\201\143%-%s%'%.]*$") then	add_vanc_error (cfg.err_msg_supl['non-Latin char']);	return false;	-- not a string of Latin characters; Vancouver requires Romanization	end;	return true; end --[[--------------------------< R E D U C E _ T O _ I N I T I A L S >------------------------------------------ Attempts to convert names to initials in support of |name-list-style=vanc. Names in |firstn= may be separated by spaces or hyphens, or for initials, a period. See http://www.ncbi.nlm.nih.gov/books/NBK7271/box/A35062/. Vancouver style requires family rank designations (Jr, II, III, etc.) to be rendered as Jr, 2nd, 3rd, etc. See http://www.ncbi.nlm.nih.gov/books/NBK7271/box/A35085/. This code only accepts and understands generational suffix in the Vancouver format because Roman numerals look like, and can be mistaken for, initials. This function uses ustring functions because firstname initials may be any of the Unicode Latin characters accepted by is_good_vanc_name (). ]] local function reduce_to_initials(first)	local name, suffix = mw.ustring.match(first, "^(%u+) ([%dJS][%drndth]+)$");	if not name then	-- if not initials and a suffix	name = mw.ustring.match(first, "^(%u+)$");	-- is it just initials?	end	if name then	-- if first is initials with or without suffix	if 3 > mw.ustring.len (name) then	-- if one or two initials	if suffix then	-- if there is a suffix	if is_suffix (suffix) then	-- is it legitimate?	return first;	-- one or two initials and a valid suffix so nothing to do	else	add_vanc_error (cfg.err_msg_supl.suffix);	-- one or two initials with invalid suffix so error message	return first;	-- and return first unmolested	end	else	return first;	-- one or two initials without suffix; nothing to do	end	end	end	-- if here then name has 3 or more uppercase letters so treat them as a word	local initials, names = {}, {};	-- tables to hold name parts and initials	local i = 1;	-- counter for number of initials	names = mw.text.split (first, '[%s,]+');	-- split into a table of names and possible suffix	while names[i] do	-- loop through the table	if 1 < i and names[i]:match ('[%dJS][%drndth]+%.?$') then	-- if not the first name, and looks like a suffix (may have trailing dot)	names[i] = names[i]:gsub ('%.', '');	-- remove terminal dot if present	if is_suffix (names[i]) then	-- if a legitimate suffix	table.insert (initials, ' ' .. names[i]);	-- add a separator space, insert at end of initials table	break;	-- and done because suffix must fall at the end of a name	end	-- no error message if not a suffix; possibly because of Romanization	end	if 3 > i then	table.insert (initials, mw.ustring.sub(names[i], 1, 1));	-- insert the initial at end of initials table	end	i = i+1;	-- bump the counter	end	return table.concat(initials)	-- Vancouver format does not include spaces. end --[[--------------------------< L I S T _ P E O P L E >------------------------------------------------------- Formats a list of people (e.g. authors, contributors, editors, interviewers, translators) names in the list will be linked when	|<name>-link= has a value	|<name>-mask- does NOT have a value; masked names are presumed to have been rendered previously so should have been linked there when |<name>-mask=0, the associated name is not rendered ]] local function list_people (control, people, etal)	local sep;	local namesep;	local format = control.format;	local maximum = control.maximum;	local lastauthoramp = control.lastauthoramp;	-- TODO: delete after deprecation	local name_list = {};	if 'vanc' == format then	-- Vancouver-like name styling?	sep = cfg.presentation['sep_nl_vanc'];	-- name-list separator between names is a comma	namesep = cfg.presentation['sep_name_vanc'];	-- last/first separator is a space	lastauthoramp = nil;	-- TODO: delete after deprecation	-- unset because isn't used by Vancouver style	else	sep = cfg.presentation['sep_nl'];	-- name-list separator between names is a semicolon	namesep = cfg.presentation['sep_name'];	-- last/first separator is <comma><space>	end	if sep:sub (-1, -1) ~= " " then sep = sep .. " " end	if utilities.is_set (maximum) and maximum < 1 then return "", 0; end	-- returned 0 is for EditorCount; not used for other names	for i, person in ipairs (people) do	if utilities.is_set (person.last) then	local mask = person.mask;	local one;	local sep_one = sep;	if utilities.is_set (maximum) and i > maximum then	etal = true;	break;	end	if mask then	local n = tonumber (mask);	-- convert to a number if it can be converted; nil else	if n then	one = 0 ~= n and string.rep("&mdash;",n) or nil;	-- make a string of (n > 0) mdashes, nil else, to replace name	person.link = nil;	-- don't create link to name if name is replaces with mdash string or has been set nil	else	one = mask;	-- replace name with mask text (must include name-list separator)	sep_one = " ";	-- modify name-list separator	end	else	one = person.last;	-- get surname	local first = person.first	-- get given name	if utilities.is_set (first) then	if ("vanc" == format) then	-- if Vancouver format	one = one:gsub ('%.', '');	-- remove periods from surnames (http://www.ncbi.nlm.nih.gov/books/NBK7271/box/A35029/)	if not person.corporate and is_good_vanc_name (one, first) then	-- and name is all Latin characters; corporate authors not tested	first = reduce_to_initials (first);	-- attempt to convert first name(s) to initials	end	end	one = one .. namesep .. first;	end	end	if utilities.is_set (person.link) then	one = utilities.make_wikilink (person.link, one);	-- link author/editor	end	if one then	-- if <one> has a value (name, mdash replacement, or mask text replacement)	table.insert (name_list, one);	-- add it to the list of names	table.insert (name_list, sep_one);	-- add the proper name-list separator	end	end	end	local count = #name_list / 2;	-- (number of names + number of separators) divided by 2	if 0 < count then	if 1 < count and not etal then	if 'amp' == format or utilities.is_set (lastauthoramp) then	-- TODO: delete lastauthoramp after deprecation	name_list[#name_list-2] = " & ";	-- replace last separator with ampersand text	elseif 'and' == format then	if 2 == count then	name_list[#name_list-2] = cfg.presentation.sep_nl_and;	-- replace last separator with 'and' text	else	name_list[#name_list-2] = cfg.presentation.sep_nl_end;	-- replace last separator with '(sep) and' text	end	end	end	name_list[#name_list] = nil;	-- erase the last separator	end	local result = table.concat (name_list);	-- construct list	if etal and utilities.is_set (result) then	-- etal may be set by |display-authors=etal but we might not have a last-first list	result = result .. sep .. ' ' .. cfg.messages['et al'];	-- we've got a last-first list and etal so add et al.	end	return result, count;	-- return name-list string and count of number of names (count used for editor names only) end --[[--------------------------< A N C H O R _ I D >------------------------------------------------------------ Generates a CITEREF anchor ID if we have at least one name or a date. Otherwise returns an empty string. namelist is one of the contributor-, author-, or editor-name lists chosen in that order. year is Year or anchor_year. ]] local function anchor_id (namelist, year)	local names={};	-- a table for the one to four names and year	for i,v in ipairs (namelist) do	-- loop through the list and take up to the first four last names	names[i] = v.last	if i == 4 then break end	-- if four then done	end	table.insert (names, year);	-- add the year at the end	local id = table.concat(names);	-- concatenate names and year for CITEREF id	if utilities.is_set (id) then	-- if concatenation is not an empty string	return "CITEREF" .. id;	-- add the CITEREF portion	else	return '';	-- return an empty string; no reason to include CITEREF id in this citation	end end --[[--------------------------< N A M E _ H A S _ E T A L >---------------------------------------------------- Evaluates the content of name parameters (author, editor, etc.) for variations on the theme of et al. If found, the et al. is removed, a flag is set to true and the function returns the modified name and the flag. This function never sets the flag to false but returns it's previous state because it may have been set by previous passes through this function or by the associated |display-<names>=etal parameter ]] local function name_has_etal (name, etal, nocat, param)	if utilities.is_set (name) then	-- name can be nil in which case just return	local patterns = cfg.et_al_patterns;	--get patterns from configuration	for _, pattern in ipairs (patterns) do	-- loop through all of the patterns	if name:match (pattern) then	-- if this 'et al' pattern is found in name	name = name:gsub (pattern, '');	-- remove the offending text	etal = true;	-- set flag (may have been set previously here or by |display-<names>=etal)	if not nocat then	-- no categorization for |vauthors=	table.insert( z.message_tail, {utilities.set_message ('err_etal', {param})});	-- and set an error if not added	end	end	end	end	return name, etal; end --[[--------------------------< N A M E _ I S _ N U M E R I C >------------------------------------------------ Add maint cat when name parameter value does not contain letters. Does not catch mixed alphanumeric names so |last=A. Green (1922-1987) does not get caught in the current version of this test but |first=(1888) is caught. returns nothing ]] local function name_is_numeric (name, list_name)	if utilities.is_set (name) then	if mw.ustring.match (name, '^[%A]+$') then	-- when name does not contain any letters	utilities.set_message ('maint_numeric_names', cfg.special_case_translation [list_name]);	-- add a maint cat for this template	end	end end --[[--------------------------< N A M E _ H A S _ E D _ M A R K U P >------------------------------------------ Evaluates the content of author and editor parameters for extraneous editor annotations: ed, ed., eds, (Ed.), etc. These annotation do not belong in author parameters and are redundant in editor parameters. If found, the function adds the editor markup maintenance category. returns nothing ]] local function name_has_ed_markup (name, list_name)	local patterns = cfg.editor_markup_patterns;	-- get patterns from configuration	if utilities.is_set (name) then	for _, pattern in ipairs (patterns) do	-- spin through patterns table and	if name:match (pattern) then	utilities.set_message ('maint_extra_text_names', cfg.special_case_translation [list_name]);	-- add a maint cat for this template	break;	end	end	end end --[[--------------------------< N A M E _ H A S _ M U L T _ N A M E S >---------------------------------------- Evaluates the content of last/surname (authors etc.) parameters for multiple names. Multiple names are indicated if there is more than one comma or any semicolons. If found, the function adds the multiple name maintenance category. returns nothing ]] local function name_has_mult_names (name, list_name)	local _, commas, semicolons;	if utilities.is_set (name) then	_, commas = name:gsub (',', '');	-- count the number of commas	_, semicolons = name:gsub (';', '');	-- count the number of semicolons	if 1 < commas or 0 < semicolons then	utilities.set_message ('maint_mult_names', cfg.special_case_translation [list_name]);	-- add a maint message	end	end end --[[--------------------------< N A M E _ C H E C K S >-------------------------------------------------------- This function calls various name checking functions used to validate the content of the various name-holding parameters. ]] local function name_checks (last, first, list_name)	local accept_name;	if utilities.is_set (last) then	last, accept_name = utilities.has_accept_as_written (last);	-- remove accept-this-as-written markup when it wraps all of <last>	if not accept_name then	-- <last> not wrapped in accept-as-written markup	name_has_mult_names (last, list_name);	-- check for multiple names in the parameter (last only)	name_has_ed_markup (last, list_name);	-- check for extraneous 'editor' annotation	name_is_numeric (last, list_name);	-- check for names that are compsed of digits and punctuation	end	end	if utilities.is_set (first) then	first, accept_name = utilities.has_accept_as_written (first);	-- remove accept-this-as-written markup when it wraps all of <first>	if not accept_name then	-- <first> not wrapped in accept-as-written markup	name_has_ed_markup (first, list_name);	-- check for extraneous 'editor' annotation	name_is_numeric (first, list_name);	-- check for names that are compsed of digits and punctuation	end	end	return last, first;	-- done end --[[--------------------------< E X T R A C T _ N A M E S >---------------------------------------------------- Gets name list from the input arguments Searches through args in sequential order to find |lastn= and |firstn= parameters (or their aliases), and their matching link and mask parameters. Stops searching when both |lastn= and |firstn= are not found in args after two sequential attempts: found |last1=, |last2=, and |last3= but doesn't find |last4= and |last5= then the search is done. This function emits an error message when there is a |firstn= without a matching |lastn=. When there are 'holes' in the list of last names, |last1= and |last3= are present but |last2= is missing, an error message is emitted. |lastn= is not required to have a matching |firstn=. When an author or editor parameter contains some form of 'et al.', the 'et al.' is stripped from the parameter and a flag (etal) returned that will cause list_people() to add the static 'et al.' text from Module:Citation/CS1/Configuration. This keeps 'et al.' out of the template's metadata. When this occurs, the page is added to a maintenance category. ]] local function extract_names(args, list_name)	local names = {};	-- table of names	local last;	-- individual name components	local first;	local link;	local mask;	local i = 1;	-- loop counter/indexer	local n = 1;	-- output table indexer	local count = 0;	-- used to count the number of times we haven't found a |last= (or alias for authors, |editor-last or alias for editors)	local etal = false;	-- return value set to true when we find some form of et al. in an author parameter	local last_alias, first_alias, link_alias;	-- selected parameter aliases used in error messaging	while true do	last, last_alias = utilities.select_one ( args, cfg.aliases[list_name .. '-Last'], 'err_redundant_parameters', i );	-- search through args for name components beginning at 1	first, first_alias = utilities.select_one ( args, cfg.aliases[list_name .. '-First'], 'err_redundant_parameters', i );	link, link_alias = utilities.select_one ( args, cfg.aliases[list_name .. '-Link'], 'err_redundant_parameters', i );	mask = utilities.select_one ( args, cfg.aliases[list_name .. '-Mask'], 'err_redundant_parameters', i );	last, etal = name_has_etal (last, etal, false, last_alias);	-- find and remove variations on et al.	first, etal = name_has_etal (first, etal, false, first_alias);	-- find and remove variations on et al.	last, first = name_checks (last, first, list_name);	-- multiple names, extraneous annotation, etc. checks	if first and not last then	-- if there is a firstn without a matching lastn	local alias = first_alias:find ('given', 1, true) and 'given' or 'first';	-- get first or given form of the alias	table.insert (z.message_tail, { utilities.set_message ( 'err_first_missing_last', {	first_alias,	-- param name of alias missing its mate	first_alias:gsub (alias, {['first'] = 'last', ['given'] = 'surname'}),	-- make param name appropriate to the alias form	}, true ) } );	-- add this error message	elseif not first and not last then	-- if both firstn and lastn aren't found, are we done?	count = count + 1;	-- number of times we haven't found last and first	if 2 <= count then	-- two missing names and we give up	break;	-- normal exit or there is a two-name hole in the list; can't tell which	end	else	-- we have last with or without a first	local result;	link = link_title_ok (link, link_alias, last, last_alias);	-- check for improper wiki-markup	if first then	link = link_title_ok (link, link_alias, first, first_alias);	-- check for improper wiki-markup	end	names[n] = {last = last, first = first, link = link, mask = mask, corporate = false};	-- add this name to our names list (corporate for |vauthors= only)	n = n + 1;	-- point to next location in the names table	if 1 == count then	-- if the previous name was missing	table.insert( z.message_tail, { utilities.set_message ( 'err_missing_name', {list_name:match ("(%w+)List"):lower(), i - 1}, true ) } );	-- add this error message	end	count = 0;	-- reset the counter, we're looking for two consecutive missing names	end	i = i + 1;	-- point to next args location	end	return names, etal;	-- all done, return our list of names and the etal flag end --[[--------------------------< G E T _ I S O 6 3 9 _ C O D E >------------------------------------------------ Validates language names provided in |language= parameter if not an ISO639-1 or 639-2 code. Returns the language name and associated two- or three-character code. Because case of the source may be incorrect or different from the case that WikiMedia uses, the name comparisons are done in lower case and when a match is found, the Wikimedia version (assumed to be correct) is returned along with the code. When there is no match, we return the original language name string. mw.language.fetchLanguageNames(<local wiki language>, 'all') returns a list of languages that in some cases may include extensions. For example, code 'cbk-zam' and its associated name 'Chavacano de Zamboanga' (MediaWiki does not support code 'cbk' or name 'Chavacano'. Most (all?) of these languages are not used a 'language' codes per se, rather they are used as sub-domain names: cbk-zam.wikipedia.org. A list of language names and codes supported by fetchLanguageNames() can be found at Template:Citation Style documentation/language/doc Names that are included in the list will be found if that name is provided in the |language= parameter. For example, if |language=Chavacano de Zamboanga, that name will be found with the associated code 'cbk-zam'. When names are found and the associated code is not two or three characters, this function returns only the WikiMedia language name. Some language names have multiple entries under different codes:	Aromanian has code rup and code roa-rup When this occurs, this function returns the language name and the 2- or 3-character code Adapted from code taken from Module:Check ISO 639-1. ]] local function get_iso639_code (lang, this_wiki_code)	if cfg.lang_name_remap[lang:lower()] then	-- if there is a remapped name (because MediaWiki uses something that we don't think is correct)	return cfg.lang_name_remap[lang:lower()][1], cfg.lang_name_remap[lang:lower()][2];	-- for this language 'name', return a possibly new name and appropriate code	end	local ietf_code;	-- because some languages have both IETF-like codes and ISO 639-like codes	local ietf_name;	local langlc = mw.ustring.lower (lang);	-- lower-case version for comparisons	for code, name in pairs (cfg.languages) do	-- scan the list to see if we can find our language	if langlc == mw.ustring.lower (name) then	if 2 == #code or 3 == #code then	-- two- or three-character codes only; IETF extensions not supported	return name, code;	-- so return the name and the code	end	ietf_code = code;	-- remember that we found an IETF-like code and save its name	ietf_name = name;	-- but keep looking for a 2- or 3-char code	end	end	-- didn't find name with 2- or 3-char code; if IETF-like code found return	return ietf_code and ietf_name or lang;	-- associated name; return original language text else end --[[--------------------------< L A N G U A G E _ P A R A M E T E R >------------------------------------------ Gets language name from a provided two- or three-character ISO 639 code. If a code is recognized by MediaWiki, use the returned name; if not, then use the value that was provided with the language parameter. When |language= contains a recognized language (either code or name), the page is assigned to the category for that code: Category:Norwegian-language sources (no). For valid three-character code languages, the page is assigned to the single category for '639-2' codes: Category:CS1 ISO 639-2 language sources. Languages that are the same as the local wiki are not categorized. MediaWiki does not recognize three-character equivalents of two-character codes: code 'ar' is recognized but code 'ara' is not. This function supports multiple languages in the form |language=nb, French, th where the language names or codes are separated from each other by commas with optional space characters. ]] local function language_parameter (lang)	local code;	-- the two- or three-character language code	local name;	-- the language name	local language_list = {};	-- table of language names to be rendered	local names_table = {};	-- table made from the value assigned to |language=	local this_wiki_name = mw.language.fetchLanguageName (cfg.this_wiki_code, cfg.this_wiki_code);	-- get this wiki's language name	names_table = mw.text.split (lang, '%s*,%s*');	-- names should be a comma separated list	for _, lang in ipairs (names_table) do	-- reuse lang	name = cfg.lang_code_remap[lang:lower()];	-- first see if this is a code that is not supported by MediaWiki but is in remap	if name then	-- there was a remapped code so	if not lang:match ('^%a%a%a?%-x%-%a+$') then	-- if not a private IETF tag	lang = lang:gsub ('^(%a%a%a?)%-.*', '%1');	-- strip IETF tags from code	end	else	lang = lang:gsub ('^(%a%a%a?)%-.*', '%1');	-- strip any IETF-like tags from code	if 2 == lang:len() or 3 == lang:len() then	-- if two-or three-character code	name = mw.language.fetchLanguageName (lang:lower(), cfg.this_wiki_code);	-- get language name if |language= is a proper code	end	end	if utilities.is_set (name) then	-- if |language= specified a valid code	code = lang:lower();	-- save it	else	name, code = get_iso639_code (lang, cfg.this_wiki_code);	-- attempt to get code from name (assign name here so that we are sure of proper capitalization)	end	if utilities.is_set (code) then	-- only 2- or 3-character codes	name = cfg.lang_code_remap[code] or name;	-- override wikimedia when they misuse language codes/names	if cfg.this_wiki_code ~= code then	-- when the language is not the same as this wiki's language	if 2 == code:len() then	-- and is a two-character code	utilities.add_prop_cat ('foreign_lang_source' .. code, {name, code});	-- categorize it; code appended to allow for multiple language categorization	else	-- or is a recognized language (but has a three-character code)	utilities.add_prop_cat ('foreign_lang_source_2' .. code, {code});	-- categorize it differently TODO: support multiple three-character code categories per cs1|2 template	end	elseif cfg.local_lang_cat_enable then	-- when the language and this wiki's language are the same and categorization is enabled	utilities.add_prop_cat ('local_lang_source', {name, code});	-- categorize it	end	else	utilities.set_message ('maint_unknown_lang');	-- add maint category if not already added	end	table.insert (language_list, name);	name = '';	-- so we can reuse it	end	name = utilities.make_sep_list (#language_list, language_list);	if this_wiki_name == name then	return '';	-- if one language and that language is this wiki's return an empty string (no annotation)	end	return (" " .. wrap_msg ('language', name));	-- otherwise wrap with '(in ...)'	--[[ TODO: should only return blank or name rather than full list	so we can clean up the bunched parenthetical elements Language, Type, Format	]] end --[[--------------------------< S E T _ C S 1 _ S T Y L E >---------------------------------------------------- Set style settings for CS1 citation templates. Returns separator and postscript settings At en.wiki, for cs1:	ps gets:	'.'	sep gets:	'.' ]] local function set_cs1_style (ps)	if not utilities.is_set (ps) then	-- unless explicitly set to something	ps = cfg.presentation['ps_cs1'];	-- terminate the rendered citation	end	return cfg.presentation['sep_cs1'], ps;	-- element separator end --[[--------------------------< S E T _ C S 2 _ S T Y L E >---------------------------------------------------- Set style settings for CS2 citation templates. Returns separator, postscript, ref settings At en.wiki, for cs2:	ps gets:	'' (empty string - no terminal punctuation)	sep gets:	',' ]] local function set_cs2_style (ps, ref)	if not utilities.is_set (ps) then	-- if |postscript= has not been set, set cs2 default	ps = cfg.presentation['ps_cs2'];	-- terminate the rendered citation	end	if not utilities.is_set (ref) then	-- if |ref= is not set	ref = "harv";	-- set default |ref=harv	end	return cfg.presentation['sep_cs2'], ps, ref;	-- element separator end --[[--------------------------< G E T _ S E T T I N G S _ F R O M _ C I T E _ C L A S S >---------------------- When |mode= is not set or when its value is invalid, use config.CitationClass and parameter values to establish rendered style. ]] local function get_settings_from_cite_class (ps, ref, cite_class)	local sep;	if (cite_class == "citation") then	-- for citation templates (CS2)	sep, ps, ref = set_cs2_style (ps, ref);	else	-- not a citation template so CS1	sep, ps = set_cs1_style (ps);	end	return sep, ps, ref	-- return them all end --[[--------------------------< S E T _ S T Y L E >------------------------------------------------------------ Establish basic style settings to be used when rendering the citation. Uses |mode= if set and valid or uses config.CitationClass from the template's #invoke: to establish style. ]] local function set_style (mode, ps, ref, cite_class)	local sep;	if 'cs2' == mode then	-- if this template is to be rendered in CS2 (citation) style	sep, ps, ref = set_cs2_style (ps, ref);	elseif 'cs1' == mode then	-- if this template is to be rendered in CS1 (cite xxx) style	sep, ps = set_cs1_style (ps);	else	-- anything but cs1 or cs2	sep, ps, ref = get_settings_from_cite_class (ps, ref, cite_class);	-- get settings based on the template's CitationClass	end	if cfg.keywords_xlate[ps:lower()] == 'none' then	-- if assigned value is 'none' then	ps = '';	-- set to empty string	end	return sep, ps, ref end --[=[-------------------------< I S _ P D F >------------------------------------------------------------------ Determines if a URL has the file extension that is one of the PDF file extensions used by [[MediaWiki:Common.css]] when applying the PDF icon to external links. returns true if file extension is one of the recognized extensions, else false ]=] local function is_pdf (url)	return url:match ('%.pdf$') or url:match ('%.PDF$') or	url:match ('%.pdf[%?#]') or url:match ('%.PDF[%?#]') or	url:match ('%.PDF&#035') or url:match ('%.pdf&#035'); end --[[--------------------------< S T Y L E _ F O R M A T >------------------------------------------------------ Applies CSS style to |format=, |chapter-format=, etc. Also emits an error message if the format parameter does not have a matching URL parameter. If the format parameter is not set and the URL contains a file extension that is recognized as a PDF document by MediaWiki's commons.css, this code will set the format parameter to (PDF) with the appropriate styling. ]] local function style_format (format, url, fmt_param, url_param)	if utilities.is_set (format) then	format = utilities.wrap_style ('format', format);	-- add leading space, parentheses, resize	if not utilities.is_set (url) then	format = format .. ' ' .. utilities.set_message ( 'err_format_missing_url', {fmt_param, url_param} );	-- add an error message	end	elseif is_pdf (url) then	-- format is not set so if URL is a PDF file then	format = utilities.wrap_style ('format', 'PDF');	-- set format to PDF	else	format = '';	-- empty string for concatenation	end	return format; end --[[--------------------------< G E T _ D I S P L A Y _ N A M E S >-------------------------------------------- Returns a number that defines the number of names displayed for author and editor name lists and a Boolean flag to indicate when et al. should be appended to the name list. When the value assigned to |display-xxxxors= is a number greater than or equal to zero, return the number and the previous state of the 'etal' flag (false by default but may have been set to true if the name list contains some variant of the text 'et al.'). When the value assigned to |display-xxxxors= is the keyword 'etal', return a number that is one greater than the number of authors in the list and set the 'etal' flag true. This will cause the list_people() to display all of the names in the name list followed by 'et al.' In all other cases, returns nil and the previous state of the 'etal' flag. inputs:	max: A['DisplayAuthors'] or A['DisplayEditors']; a number or some flavor of etal	count: #a or #e	list_name: 'authors' or 'editors'	etal: author_etal or editor_etal ]] local function get_display_names (max, count, list_name, etal)	if utilities.is_set (max) then	if 'etal' == max:lower():gsub("[ '%.]", '') then	-- the :gsub() portion makes 'etal' from a variety of 'et al.' spellings and stylings	max = count + 1;	-- number of authors + 1 so display all author name plus et al.	etal = true;	-- overrides value set by extract_names()	elseif max:match ('^%d+$') then	-- if is a string of numbers	max = tonumber (max);	-- make it a number	if max >= count then	-- if |display-xxxxors= value greater than or equal to number of authors/editors	table.insert( z.message_tail, {utilities.set_message ('err_disp_name', {cfg.special_case_translation [list_name], max}, true)});	-- add error message	max = nil;	end	else	-- not a valid keyword or number	table.insert( z.message_tail, {utilities.set_message ('err_disp_name', {cfg.special_case_translation [list_name], max}, true)});	-- add error message	max = nil;	-- unset; as if |display-xxxxors= had not been set	end	end	return max, etal; end --[[--------------------------< E X T R A _ T E X T _ I N _ P A G E _ C H E C K >------------------------------ Adds page to Category:CS1 maint: extra text if |page= or |pages= has what appears to be some form of p. or pp. abbreviation in the first characters of the parameter content. check Page and Pages for extraneous p, p., pp, and pp. at start of parameter value:	good pattern: '^P[^%.P%l]' matches when |page(s)= begins PX or P# but not Px where x and X are letters and # is a dgiit	bad pattern: '^[Pp][Pp]' matches matches when |page(s)= begins pp or pP or Pp or PP ]] local function extra_text_in_page_check (page)	local good_pattern = '^P[^%.Pp]';	-- ok to begin with uppercase P: P7 (pg 7 of section P) but not p123 (page 123) TODO: add Gg for PG or Pg?	local bad_pattern = '^[Pp]?[Pp]%.?[ %d]';	if not page:match (good_pattern) and (page:match (bad_pattern) or page:match ('^[Pp]ages?')) then	utilities.set_message ('maint_extra_text');	-- add maint cat;	end end --[=[-------------------------< G E T _ V _ N A M E _ T A B L E >---------------------------------------------- split apart a |vauthors= or |veditors= parameter. This function allows for corporate names, wrapped in doubled parentheses to also have commas; in the old version of the code, the doubled parentheses were included in the rendered citation and in the metadata. Individual author names may be wikilinked	|vauthors=Jones AB, [[E. B. White|White EB]], ((Black, Brown, and Co.)) ]=] local function get_v_name_table (vparam, output_table, output_link_table)	local name_table = mw.text.split(vparam, "%s*,%s*");	-- names are separated by commas	local wl_type, label, link;	-- wl_type not used here; just a place holder	local i = 1;	while name_table[i] do	if name_table[i]:match ('^%(%(.*[^%)][^%)]$') then	-- first segment of corporate with one or more commas; this segment has the opening doubled parentheses	local name = name_table[i];	i = i + 1;	-- bump indexer to next segment	while name_table[i] do	name = name .. ', ' .. name_table[i];	-- concatenate with previous segments	if name_table[i]:match ('^.*%)%)$') then	-- if this table member has the closing doubled parentheses	break;	-- and done reassembling so	end	i = i + 1;	-- bump indexer	end	table.insert (output_table, name);	-- and add corporate name to the output table	table.insert (output_link_table, '');	-- no wikilink	else	wl_type, label, link = utilities.is_wikilink (name_table[i]);	-- wl_type is: 0, no wl (text in label variable); 1, [[D]]; 2, [[L|D]]	table.insert (output_table, label);	-- add this name	if 1 == wl_type then	table.insert (output_link_table, label);	-- simple wikilink [[D]]	else	table.insert (output_link_table, link);	-- no wikilink or [[L|D]]; add this link if there is one, else empty string	end	end	i = i + 1;	end	return output_table; end --[[--------------------------< P A R S E _ V A U T H O R S _ V E D I T O R S >-------------------------------- This function extracts author / editor names from |vauthors= or |veditors= and finds matching |xxxxor-maskn= and |xxxxor-linkn= in args. It then returns a table of assembled names just as extract_names() does. Author / editor names in |vauthors= or |veditors= must be in Vancouver system style. Corporate or institutional names may sometimes be required and because such names will often fail the is_good_vanc_name() and other format compliance tests, are wrapped in doubled parentheses ((corporate name)) to suppress the format tests. Supports generational suffixes Jr, 2nd, 3rd, 4th–6th. This function sets the Vancouver error when a required comma is missing and when there is a space between an author's initials. ]] local function parse_vauthors_veditors (args, vparam, list_name)	local names = {};	-- table of names assembled from |vauthors=, |author-maskn=, |author-linkn=	local v_name_table = {};	local v_link_table = {};	-- when name is wikilinked, targets go in this table	local etal = false;	-- return value set to true when we find some form of et al. vauthors parameter	local last, first, link, mask, suffix;	local corporate = false;	vparam, etal = name_has_etal (vparam, etal, true);	-- find and remove variations on et al. do not categorize (do it here because et al. might have a period)	v_name_table = get_v_name_table (vparam, v_name_table, v_link_table);	-- names are separated by commas	for i, v_name in ipairs(v_name_table) do	first = '';	-- set to empty string for concatenation and because it may have been set for previous author/editor	local accept_name;	v_name, accept_name = utilities.has_accept_as_written (v_name);	-- remove accept-this-as-written markup when it wraps all of <v_name> --	if v_name:match ('^%(%(.+%)%)$') then	-- corporate authors are wrapped in doubled parentheses to suppress vanc formatting and error detection --	last = v_name:match ('^%(%((.+)%)%)$')	-- remove doubled parentheses	if accept_name then	last = v_name;	corporate = true;	-- flag used in list_people()	elseif string.find(v_name, "%s") then	if v_name:find('[;%.]') then	-- look for commonly occurring punctuation characters;	add_vanc_error (cfg.err_msg_supl.punctuation);	end	local lastfirstTable = {}	lastfirstTable = mw.text.split(v_name, "%s+")	first = table.remove(lastfirstTable);	-- removes and returns value of last element in table which should be initials or generational suffix	if not mw.ustring.match (first, '^%u+$') then	-- mw.ustring here so that later we will catch non-Latin characters	suffix = first;	-- not initials so assume that whatever we got is a generational suffix	first = table.remove(lastfirstTable);	-- get what should be the initials from the table	end	last = table.concat(lastfirstTable, ' ')	-- returns a string that is the concatenation of all other names that are not initials and generational suffix	if not utilities.is_set (last) then	first = '';	-- unset	last = v_name;	-- last empty because something wrong with first	add_vanc_error (cfg.err_msg_supl.name);	end	if mw.ustring.match (last, '%a+%s+%u+%s+%a+') then	add_vanc_error (cfg.err_msg_supl['missing comma']);	-- matches last II last; the case when a comma is missing	end	if mw.ustring.match (v_name, ' %u %u$') then	-- this test is in the wrong place TODO: move or replace with a more appropriate test	add_vanc_error (cfg.err_msg_supl.name);	-- matches a space between two initials	end	else	last = v_name;	-- last name or single corporate name? Doesn't support multiword corporate names? do we need this?	end	if utilities.is_set (first) then	if not mw.ustring.match (first, "^%u?%u$") then	-- first shall contain one or two upper-case letters, nothing else	add_vanc_error (cfg.err_msg_supl.initials);	-- too many initials; mixed case initials (which may be ok Romanization); hyphenated initials	end	is_good_vanc_name (last, first, suffix);	-- check first and last before restoring the suffix which may have a non-Latin digit	if utilities.is_set (suffix) then	first = first .. ' ' .. suffix;	-- if there was a suffix concatenate with the initials	suffix = '';	-- unset so we don't add this suffix to all subsequent names	end	else	if not corporate then	is_good_vanc_name (last, '');	end	end	link = utilities.select_one ( args, cfg.aliases[list_name .. '-Link'], 'err_redundant_parameters', i ) or v_link_table[i];	mask = utilities.select_one ( args, cfg.aliases[list_name .. '-Mask'], 'err_redundant_parameters', i );	names[i] = {last = last, first = first, link = link, mask = mask, corporate = corporate};	-- add this assembled name to our names list	end	return names, etal;	-- all done, return our list of names end --[[--------------------------< S E L E C T _ A U T H O R _ E D I T O R _ S O U R C E >------------------------ Select one of |authors=, |authorn= / |lastn / firstn=, or |vauthors= as the source of the author name list or select one of |editors=, |editorn= / editor-lastn= / |editor-firstn= or |veditors= as the source of the editor name list. Only one of these appropriate three will be used. The hierarchy is: |authorn= (and aliases) highest and |authors= lowest and similarly, |editorn= (and aliases) highest and |editors= lowest When looking for |authorn= / |editorn= parameters, test |xxxxor1= and |xxxxor2= (and all of their aliases); stops after the second test which mimicks the test used in extract_names() when looking for a hole in the author name list. There may be a better way to do this, I just haven't discovered what that way is. Emits an error message when more than one xxxxor name source is provided. In this function, vxxxxors = vauthors or veditors; xxxxors = authors or editors as appropriate. ]] local function select_author_editor_source (vxxxxors, xxxxors, args, list_name)	local lastfirst = false;	if utilities.select_one ( args, cfg.aliases[list_name .. '-Last'], 'none', 1 ) or	-- do this twice in case we have a |first1= without a |last1=; this ...	utilities.select_one ( args, cfg.aliases[list_name .. '-First'], 'none', 1 ) or	-- ... also catches the case where |first= is used with |vauthors=	utilities.select_one ( args, cfg.aliases[list_name .. '-Last'], 'none', 2 ) or	utilities.select_one ( args, cfg.aliases[list_name .. '-First'], 'none', 2 ) then	lastfirst = true;	end	if (utilities.is_set (vxxxxors) and true == lastfirst) or	-- these are the three error conditions	(utilities.is_set (vxxxxors) and utilities.is_set (xxxxors)) or	(true == lastfirst and utilities.is_set (xxxxors)) then	local err_name;	if 'AuthorList' == list_name then	-- figure out which name should be used in error message	err_name = 'author';	else	err_name = 'editor';	end	table.insert( z.message_tail, { utilities.set_message ( 'err_redundant_parameters',	{err_name .. '-name-list parameters'}, true ) } );	-- add error message	end	if true == lastfirst then return 1 end;	-- return a number indicating which author name source to use	if utilities.is_set (vxxxxors) then return 2 end;	if utilities.is_set (xxxxors) then return 3 end;	return 1;	-- no authors so return 1; this allows missing author name test to run in case there is a first without last end --[[--------------------------< I S _ V A L I D _ P A R A M E T E R _ V A L U E >------------------------------ This function is used to validate a parameter's assigned value for those parameters that have only a limited number of allowable values (yes, y, true, live, dead, etc.). When the parameter value has not been assigned a value (missing or empty in the source template) the function returns the value specified by ret_val. If the parameter value is one of the list of allowed values returns the translated value; else, emits an error message and returns the value specified by ret_val. ]] local function is_valid_parameter_value (value, name, possible, ret_val)	if not utilities.is_set (value) then	return ret_val;	-- an empty parameter is ok	elseif utilities.in_array (value, possible) then	return cfg.keywords_xlate[value];	-- return translation of parameter keyword	else	table.insert( z.message_tail, { utilities.set_message ( 'err_invalid_param_val', {name, value}, true ) } );	-- not an allowed value so add error message	return ret_val;	end end --[[--------------------------< T E R M I N A T E _ N A M E _ L I S T >---------------------------------------- This function terminates a name list (author, contributor, editor) with a separator character (sepc) and a space when the last character is not a sepc character or when the last three characters are not sepc followed by two closing square brackets (close of a wikilink). When either of these is true, the name_list is terminated with a single space character. ]] local function terminate_name_list (name_list, sepc)	if (string.sub (name_list, -3, -1) == sepc .. '. ') then	-- if already properly terminated	return name_list;	-- just return the name list	elseif (string.sub (name_list, -1, -1) == sepc) or (string.sub (name_list, -3, -1) == sepc .. ']]') then	-- if last name in list ends with sepc char	return name_list .. " ";	-- don't add another	else	return name_list .. sepc .. ' ';	-- otherwise terminate the name list	end end --[[-------------------------< F O R M A T _ V O L U M E _ I S S U E >---------------------------------------- returns the concatenation of the formatted volume and issue parameters as a single string; or formatted volume or formatted issue, or an empty string if neither are set. ]] local function format_volume_issue (volume, issue, cite_class, origin, sepc, lower)	if not utilities.is_set (volume) and not utilities.is_set (issue) then	return '';	end	if 'magazine' == cite_class or (utilities.in_array (cite_class, {'citation', 'map'}) and 'magazine' == origin) then	if utilities.is_set (volume) and utilities.is_set (issue) then	return wrap_msg ('vol-no', {sepc, volume, issue}, lower);	elseif utilities.is_set (volume) then	return wrap_msg ('vol', {sepc, volume}, lower);	else	return wrap_msg ('issue', {sepc, issue}, lower);	end	end	if 'podcast' == cite_class and utilities.is_set (issue) then	return wrap_msg ('issue', {sepc, issue}, lower);	end	local vol = '';	-- here for all cites except magazine	if utilities.is_set (volume) then	if volume:match ('^[MDCLXVI]+$') or volume:match ('^%d+$') then	-- volume value is all digits or all uppercase Roman numerals	vol = utilities.substitute (cfg.presentation['vol-bold'], {sepc, hyphen_to_dash(volume)});	-- render in bold face	elseif (4 < mw.ustring.len(volume)) then	-- not all digits or Roman numerals and longer than 4 characters	vol = utilities.substitute (cfg.messages['j-vol'], {sepc, volume});	-- not bold	utilities.add_prop_cat ('long_vol');	else	-- four or less characters	vol = utilities.substitute (cfg.presentation['vol-bold'], {sepc, hyphen_to_dash(volume)});	-- bold	end	end	if utilities.is_set (issue) then	return vol .. utilities.substitute (cfg.messages['j-issue'], issue);	end	return vol; end --[[-------------------------< F O R M A T _ P A G E S _ S H E E T S >----------------------------------------- adds static text to one of |page(s)= or |sheet(s)= values and returns it with all of the others set to empty strings. The return order is:	page, pages, sheet, sheets Singular has priority over plural when both are provided. ]] local function format_pages_sheets (page, pages, sheet, sheets, cite_class, origin, sepc, nopp, lower)	if 'map' == cite_class then	-- only cite map supports sheet(s) as in-source locators	if utilities.is_set (sheet) then	if 'journal' == origin then	return '', '', wrap_msg ('j-sheet', sheet, lower), '';	else	return '', '', wrap_msg ('sheet', {sepc, sheet}, lower), '';	end	elseif utilities.is_set (sheets) then	if 'journal' == origin then	return '', '', '', wrap_msg ('j-sheets', sheets, lower);	else	return '', '', '', wrap_msg ('sheets', {sepc, sheets}, lower);	end	end	end	local is_journal = 'journal' == cite_class or (utilities.in_array (cite_class, {'citation', 'map', 'interview'}) and 'journal' == origin);	if utilities.is_set (page) then	if is_journal then	return utilities.substitute (cfg.messages['j-page(s)'], page), '', '', '';	elseif not nopp then	return utilities.substitute (cfg.messages['p-prefix'], {sepc, page}), '', '', '';	else	return utilities.substitute (cfg.messages['nopp'], {sepc, page}), '', '', '';	end	elseif utilities.is_set (pages) then	if is_journal then	return utilities.substitute (cfg.messages['j-page(s)'], pages), '', '', '';	elseif tonumber(pages) ~= nil and not nopp then	-- if pages is only digits, assume a single page number	return '', utilities.substitute (cfg.messages['p-prefix'], {sepc, pages}), '', '';	elseif not nopp then	return '', utilities.substitute (cfg.messages['pp-prefix'], {sepc, pages}), '', '';	else	return '', utilities.substitute (cfg.messages['nopp'], {sepc, pages}), '', '';	end	end	return '', '', '', '';	-- return empty strings end --[[--------------------------< I N S O U R C E _ L O C _ G E T >---------------------------------------------- returns one of the in-source locators: page, pages, or at. If any of these are interwiki links to Wikisource, returns the label portion of the interwiki-link as plain text for use in COinS. This COinS thing is done because here we convert an interwiki-link to and external link and add an icon span around that; get_coins_pages() doesn't know about the span. TODO: should it? TODO: add support for sheet and sheets?; streamline; TODO: make it so that this function returns only one of the three as the single in-source (the return value assigned to a new name)? ]] local function insource_loc_get (page, pages, at)	local ws_url, ws_label, coins_pages, L;	-- for Wikisource interwiki-links; TODO: this corrupts page metadata (span remains in place after cleanup; fix there?)	if utilities.is_set (page) then	if utilities.is_set (pages) or utilities.is_set (at) then	pages = '';	-- unset the others	at = '';	end	extra_text_in_page_check (page);	-- add this page to maint cat if |page= value begins with what looks like p. or pp.	ws_url, ws_label, L = wikisource_url_make (page);	-- make ws URL from |page= interwiki link; link portion L becomes tooltip label	if ws_url then	page = external_link (ws_url, ws_label .. '&nbsp;', 'ws link in page');	-- space char after label to move icon away from in-source text; TODO: a better way to do this?	page = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], L, page});	coins_pages = ws_label;	end	elseif utilities.is_set (pages) then	if utilities.is_set (at) then	at = '';	-- unset	end	extra_text_in_page_check (pages);	-- add this page to maint cat if |pages= value begins with what looks like p. or pp.	ws_url, ws_label, L = wikisource_url_make (pages);	-- make ws URL from |pages= interwiki link; link portion L becomes tooltip label	if ws_url then	pages = external_link (ws_url, ws_label .. '&nbsp;', 'ws link in pages');	-- space char after label to move icon away from in-source text; TODO: a better way to do this?	pages = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], L, pages});	coins_pages = ws_label;	end	elseif utilities.is_set (at) then	ws_url, ws_label, L = wikisource_url_make (at);	-- make ws URL from |at= interwiki link; link portion L becomes tooltip label	if ws_url then	at = external_link (ws_url, ws_label .. '&nbsp;', 'ws link in at');	-- space char after label to move icon away from in-source text; TODO: a better way to do this?	at = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], L, at});	coins_pages = ws_label;	end	end	return page, pages, at, coins_pages; end --[=[-------------------------< A R C H I V E _ U R L _ C H E C K >-------------------------------------------- Check archive.org URLs to make sure they at least look like they are pointing at valid archives and not to the save snapshot URL or to calendar pages. When the archive URL is 'https://web.archive.org/save/' (or http://...) archive.org saves a snapshot of the target page in the URL. That is something that Wikipedia should not allow unwitting readers to do. When the archive.org URL does not have a complete timestamp, archive.org chooses a snapshot according to its own algorithm or provides a calendar 'search' result. [[WP:ELNO]] discourages links to search results. This function looks at the value assigned to |archive-url= and returns empty strings for |archive-url= and |archive-date= and an error message when:	|archive-url= holds an archive.org save command URL	|archive-url= is an archive.org URL that does not have a complete timestamp (YYYYMMDDhhmmss 14 digits) in the	correct place otherwise returns |archive-url= and |archive-date= There are two mostly compatible archive.org URLs:	//web.archive.org/<timestamp>...	-- the old form	//web.archive.org/web/<timestamp>...	-- the new form The old form does not support or map to the new form when it contains a display flag. There are four identified flags ('id_', 'js_', 'cs_', 'im_') but since archive.org ignores others following the same form (two letters and an underscore) we don't check for these specific flags but we do check the form. This function supports a preview mode. When the article is rendered in preview mode, this function may return a modified archive URL:	for save command errors, return undated wildcard (/*/)	for timestamp errors when the timestamp has a wildcard, return the URL unmodified	for timestamp errors when the timestamp does not have a wildcard, return with timestamp limited to six digits plus wildcard (/yyyymm*/) ]=] local function archive_url_check (url, date)	local err_msg = '';	-- start with the error message empty	local path, timestamp, flag;	-- portions of the archive.org URL	if (not url:match('//web%.archive%.org/')) and (not url:match('//liveweb%.archive%.org/')) then	-- also deprecated liveweb Wayback machine URL	return url, date;	-- not an archive.org archive, return ArchiveURL and ArchiveDate	end	if url:match('//web%.archive%.org/save/') then	-- if a save command URL, we don't want to allow saving of the target page	err_msg = cfg.err_msg_supl.save;	url = url:gsub ('(//web%.archive%.org)/save/', '%1/*/', 1);	-- for preview mode: modify ArchiveURL	elseif url:match('//liveweb%.archive%.org/') then	err_msg = cfg.err_msg_supl.liveweb;	else	path, timestamp, flag = url:match('//web%.archive%.org/([^%d]*)(%d+)([^/]*)/');	-- split out some of the URL parts for evaluation	if not utilities.is_set (timestamp) or 14 ~= timestamp:len() then	-- path and flag optional, must have 14-digit timestamp here	err_msg = cfg.err_msg_supl.timestamp;	if '*' ~= flag then	url=url:gsub ('(//web%.archive%.org/[^%d]*%d?%d?%d?%d?%d?%d?)[^/]*', '%1*', 1)	-- for preview, modify ts to be yearmo* max (0-6 digits plus splat)	end	elseif utilities.is_set (path) and 'web/' ~= path then	-- older archive URLs do not have the extra 'web/' path element	err_msg = cfg.err_msg_supl.path;	elseif utilities.is_set (flag) and not utilities.is_set (path) then	-- flag not allowed with the old form URL (without the 'web/' path element)	err_msg = cfg.err_msg_supl.flag;	elseif utilities.is_set (flag) and not flag:match ('%a%a_') then	-- flag if present must be two alpha characters and underscore (requires 'web/' path element)	err_msg = cfg.err_msg_supl.flag;	else	return url, date;	-- return ArchiveURL and ArchiveDate	end	end	-- if here, something not right so	table.insert( z.message_tail, { utilities.set_message ( 'err_archive_url', {err_msg}, true ) } );	-- add error message and	if utilities.is_set (Frame:preprocess('{{REVISIONID}}')) then	return '', '';	-- return empty strings for ArchiveURL and ArchiveDate	else	return url, date;	-- preview mode so return ArchiveURL and ArchiveDate	end end --[[--------------------------< P L A C E _ C H E C K >-------------------------------------------------------- check |place=, |publication-place=, |location= to see if these params include digits. This function added because many editors misuse location to specify the in-source location (|page(s)= and |at= are supposed to do that) returns the original parameter value without modification; added maint cat when parameter value contains digits ]] local function place_check (param_val)	if not utilities.is_set (param_val) then	-- parameter empty or omitted	return param_val;	-- return that empty state	end	if mw.ustring.find (param_val, '%d') then	-- not empty, are there digits in the parameter value	utilities.set_message ('maint_location');	-- yep, add maint cat	end	return param_val;	-- and done end --[[--------------------------< I S _ G E N E R I C _ T I T L E >---------------------------------------------- compares |title= value against list of known generic title patterns. Returns true when pattern matches; nil else the k/v pairs in 'generic_titles' each contain two tables, one for English and one for another 'local' language Each of those tables contain another table that holds the string or pattern (whole title or title fragment) in index [1]. index [2] is a Boolean that tells string.find() or mw.ustring.find() to do plain-text search (true) or a pattern search (false). The intent of all this complexity is to make these searches as fast as possible so that we don't run out of processing time on very large articles. ]] local function is_generic_title (title)	title = mw.ustring.lower(title);	-- switch title to lower case	for _, generic_title in ipairs (cfg.special_case_translation['generic_titles']) do	--spin through the list of known generic title fragments	if title:find (generic_title['en'][1], 1, generic_title['en'][2]) then	return true;	-- found English generic title so done	elseif generic_title['local'] then	-- to keep work load down, generic_title['local'] should be nil except when there is a local version of the generic title	if mw.ustring.find (title, generic_title['local'][1], 1, generic_title['local'][2]) then	-- mw.ustring() because might not be Latin script	return true;	-- found local generic title so done	end	end	end end --[[--------------------------< I S _ A R C H I V E D _ C O P Y >---------------------------------------------- compares |title= to 'Archived copy' (place holder added by bots that can't find proper title); if matches, return true; nil else ]] local function is_archived_copy (title)	title = mw.ustring.lower(title);	-- switch title to lower case	if title:find (cfg.special_case_translation.archived_copy.en) then	-- if title is 'Archived copy'	return true;	elseif cfg.special_case_translation.archived_copy['local'] then	if mw.ustring.find (title, cfg.special_case_translation.archived_copy['local']) then	-- mw.ustring() because might not be Latin script	return true;	end	end end --[[--------------------------< C I T A T I O N 0 >------------------------------------------------------------ This is the main function doing the majority of the citation formatting. ]] local function citation0( config, args)	--[[	Load Input Parameters	The argument_wrapper facilitates the mapping of multiple aliases to single internal variable.	]]	local A = argument_wrapper ( args );	local i	-- Pick out the relevant fields from the arguments. Different citation templates	-- define different field names for the same underlying things.	local Mode = is_valid_parameter_value (A['Mode'], A:ORIGIN('Mode'), cfg.keywords_lists['mode'], '');	local author_etal;	local a	= {};	-- authors list from |lastn= / |firstn= pairs or |vauthors=	local Authors;	local NameListStyle = is_valid_parameter_value (A['NameListStyle'], A:ORIGIN('NameListStyle'), cfg.keywords_lists['name-list-style'], '');	local Collaboration = A['Collaboration'];	do	-- to limit scope of selected	local selected = select_author_editor_source (A['Vauthors'], A['Authors'], args, 'AuthorList');	if 1 == selected then	a, author_etal = extract_names (args, 'AuthorList');	-- fetch author list from |authorn= / |lastn= / |firstn=, |author-linkn=, and |author-maskn=	elseif 2 == selected then	NameListStyle = 'vanc';	-- override whatever |name-list-style= might be	a, author_etal = parse_vauthors_veditors (args, args.vauthors, 'AuthorList');	-- fetch author list from |vauthors=, |author-linkn=, and |author-maskn=	elseif 3 == selected then	Authors = A['Authors'];	-- use content of |authors=	if 'authors' == A:ORIGIN('Authors') then	-- but add a maint cat if the parameter is |authors=	utilities.set_message ('maint_authors');	-- because use of this parameter is discouraged; what to do about the aliases is a TODO:	end	end	if utilities.is_set (Collaboration) then	author_etal = true;	-- so that |display-authors=etal not required	end	end	local Others = A['Others'];	local editor_etal;	local e	= {};	-- editors list from |editor-lastn= / |editor-firstn= pairs or |veditors=	local Editors;	do	-- to limit scope of selected	local selected = select_author_editor_source (A['Veditors'], A['Editors'], args, 'EditorList');	if 1 == selected then	e, editor_etal = extract_names (args, 'EditorList');	-- fetch editor list from |editorn= / |editor-lastn= / |editor-firstn=, |editor-linkn=, and |editor-maskn=	elseif 2 == selected then	NameListStyle = 'vanc';	-- override whatever |name-list-style= might be	e, editor_etal = parse_vauthors_veditors (args, args.veditors, 'EditorList');	-- fetch editor list from |veditors=, |editor-linkn=, and |editor-maskn=	elseif 3 == selected then	Editors = A['Editors'];	-- use content of |editors=	end	end	local translator_etal;	local t = {};	-- translators list from |translator-lastn= / translator-firstn= pairs	local Translators;	-- assembled translators name list	t = extract_names (args, 'TranslatorList');	-- fetch translator list from |translatorn= / |translator-lastn=, -firstn=, -linkn=, -maskn=	local interviewer_etal;	local interviewers_list = {};	local Interviewers;	-- used later	interviewers_list = extract_names (args, 'InterviewerList');	-- process preferred interviewers parameters	local contributor_etal;	local c = {};	-- contributors list from |contributor-lastn= / contributor-firstn= pairs	local Contributors;	-- assembled contributors name list	local Chapter = A['Chapter'];	-- done here so that we have access to |contribution= from |chapter= aliases	local Chapter_origin = A:ORIGIN ('Chapter');	local Contribution;	-- because contribution is required for contributor(s)	if 'contribution' == A:ORIGIN ('Chapter') then	Contribution = A['Chapter'];	-- get the name of the contribution	end	if utilities.in_array (config.CitationClass, {"book", "citation"}) and not utilities.is_set (A['Periodical']) then	-- |contributor= and |contribution= only supported in book cites	c = extract_names (args, 'ContributorList');	-- fetch contributor list from |contributorn= / |contributor-lastn=, -firstn=, -linkn=, -maskn=	if 0 < #c then	if not utilities.is_set (Contribution) then	-- |contributor= requires |contribution=	table.insert( z.message_tail, { utilities.set_message ( 'err_contributor_missing_required_param', 'contribution')});	-- add missing contribution error message	c = {};	-- blank the contributors' table; it is used as a flag later	end	if 0 == #a then	-- |contributor= requires |author=	table.insert( z.message_tail, { utilities.set_message ( 'err_contributor_missing_required_param', 'author')});	-- add missing author error message	c = {};	-- blank the contributors' table; it is used as a flag later	end	end	else	-- if not a book cite	if utilities.select_one (args, cfg.aliases['ContributorList-Last'], 'err_redundant_parameters', 1 ) then	-- are there contributor name list parameters?	table.insert( z.message_tail, { utilities.set_message ( 'err_contributor_ignored')});	-- add contributor ignored error message	end	Contribution = nil;	-- unset	end	if utilities.is_set (Others) then	if 0 == #a and 0 == #e then	-- add maint cat when |others= has value and used without |author=, |editor=	utilities.set_message ('maint_others');	end	end	local Year = A['Year'];	local PublicationDate = A['PublicationDate'];	local OrigDate = A['OrigDate'];	local Date = A['Date'];	local LayDate = A['LayDate'];	------------------------------------------------- Get title data	local Title = A['Title'];	local ScriptTitle = A['ScriptTitle'];	local BookTitle = A['BookTitle'];	local Conference = A['Conference'];	local TransTitle = A['TransTitle'];	local TransTitle_origin = A:ORIGIN ('TransTitle');	local TitleNote = A['TitleNote'];	local TitleLink = A['TitleLink'];	local auto_select = ''; -- default is auto	local accept_link;	TitleLink, accept_link = utilities.has_accept_as_written(TitleLink, true); -- test for accept-this-as-written markup	if (not accept_link) and utilities.in_array (TitleLink, {'none', 'pmc', 'doi'}) then -- check for special keywords	auto_select = TitleLink; -- remember selection for later	TitleLink = ''; -- treat as if |title-link= would have been empty	end	TitleLink = link_title_ok (TitleLink, A:ORIGIN ('TitleLink'), Title, 'title');	-- check for wiki-markup in |title-link= or wiki-markup in |title= when |title-link= is set	local Section = '';	-- {{cite map}} only; preset to empty string for concatenation if not used	if 'map' == config.CitationClass and 'section' == A:ORIGIN ('Chapter') then	Section = A['Chapter'];	-- get |section= from |chapter= alias list; |chapter= and the other aliases not supported in {{cite map}}	Chapter = '';	-- unset for now; will be reset later from |map= if present	end	local ScriptChapter = A['ScriptChapter'];	local ScriptChapter_origin = A:ORIGIN ('ScriptChapter');	local ChapterLink -- = A['ChapterLink'];	-- deprecated as a parameter but still used internally by cite episode	local TransChapter = A['TransChapter'];	local TransChapter_origin = A:ORIGIN ('TransChapter');	local TitleType = A['TitleType'];	local Degree = A['Degree'];	local Docket = A['Docket'];	local ArchiveFormat = A['ArchiveFormat'];	local ArchiveDate;	local ArchiveURL;	ArchiveURL, ArchiveDate = archive_url_check (A['ArchiveURL'], A['ArchiveDate'])	local UrlStatus = is_valid_parameter_value (A['UrlStatus'], A:ORIGIN('UrlStatus'), cfg.keywords_lists['url-status'], '');	local URL = A['URL']	local URL_origin = A:ORIGIN('URL');	-- get name of parameter that holds URL	local ChapterURL = A['ChapterURL'];	local ChapterURL_origin = A:ORIGIN('ChapterURL');	-- get name of parameter that holds ChapterURL	local ConferenceFormat = A['ConferenceFormat'];	local ConferenceURL = A['ConferenceURL'];	local ConferenceURL_origin = A:ORIGIN('ConferenceURL');	-- get name of parameter that holds ConferenceURL	local Periodical = A['Periodical'];	local Periodical_origin = '';	if utilities.is_set (Periodical) then	Periodical_origin = A:ORIGIN('Periodical');	-- get the name of the periodical parameter	local i;	Periodical, i = utilities.strip_apostrophe_markup (Periodical);	-- strip apostrophe markup so that metadata isn't contaminated	if i then	-- non-zero when markup was stripped so emit an error message	table.insert( z.message_tail, {utilities.set_message ('err_apostrophe_markup', {Periodical_origin}, true)});	end	end	if 'mailinglist' == config.CitationClass then	-- special case for {{cite mailing list}}	if utilities.is_set (Periodical) and utilities.is_set (A ['MailingList']) then	-- both set emit an error	table.insert( z.message_tail, {utilities.set_message ('err_redundant_parameters', {utilities.wrap_style ('parameter', Periodical_origin) .. ' and ' .. utilities.wrap_style ('parameter', 'mailinglist')}, true )});	end	Periodical = A ['MailingList'];	-- error or no, set Periodical to |mailinglist= value because this template is {{cite mailing list}}	Periodical_origin = A:ORIGIN('MailingList');	end	local ScriptPeriodical = A['ScriptPeriodical'];	local ScriptPeriodical_origin = A:ORIGIN('ScriptPeriodical');	-- web and news not tested for now because of	-- Wikipedia:Administrators%27_noticeboard#Is_there_a_semi-automated_tool_that_could_fix_these_annoying_"Cite_Web"_errors?	if not (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)) then	-- 'periodical' templates require periodical parameter	--	local p = {['journal'] = 'journal', ['magazine'] = 'magazine', ['news'] = 'newspaper', ['web'] = 'website'};	-- for error message	local p = {['journal'] = 'journal', ['magazine'] = 'magazine'};	-- for error message	if p[config.CitationClass] then	table.insert( z.message_tail, {utilities.set_message ('err_missing_periodical', {config.CitationClass, p[config.CitationClass]}, true)});	end	end	local TransPeriodical = A['TransPeriodical'];	local TransPeriodical_origin = A:ORIGIN ('TransPeriodical');	local Series = A['Series'];	local Volume;	local Issue;	local Page;	local Pages;	local At;	if 'citation' == config.CitationClass then	if utilities.is_set (Periodical) then	if not utilities.in_array (Periodical_origin, {'website', 'mailinglist'}) then	-- {{citation}} does not render volume for these 'periodicals'	Volume = A['Volume'];	-- but does for all other 'periodicals'	end	elseif utilities.is_set (ScriptPeriodical) then	if 'script-website' ~= ScriptPeriodical_origin then	-- {{citation}} does not render volume for |script-website=	Volume = A['Volume'];	-- but does for all other 'periodicals'	end	else	Volume = A['Volume'];	-- and does for non-'periodical' cites	end	elseif utilities.in_array (config.CitationClass, cfg.templates_using_volume) then	-- render |volume= for cs1 according to the configuration settings	Volume = A['Volume'];	end	if 'citation' == config.CitationClass then	if utilities.is_set (Periodical) and utilities.in_array (Periodical_origin, {'journal', 'magazine', 'newspaper', 'periodical', 'work'}) or	-- {{citation}} renders issue for these 'periodicals'	utilities.is_set (ScriptPeriodical) and utilities.in_array (ScriptPeriodical_origin, {'script-journal', 'script-magazine', 'script-newspaper', 'script-periodical', 'script-work'}) then -- and these 'script-periodicals'	Issue = hyphen_to_dash (A['Issue']);	end	elseif utilities.in_array (config.CitationClass, cfg.templates_using_issue) then	-- conference & map books do not support issue; {{citation}} listed here because included in settings table	if not (utilities.in_array (config.CitationClass, {'conference', 'map', 'citation'}) and not (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical))) then	Issue = hyphen_to_dash (A['Issue']);	end	end	local Position = '';	if not utilities.in_array (config.CitationClass, cfg.templates_not_using_page) then	Page = A['Page'];	Pages = hyphen_to_dash (A['Pages']);	At = A['At'];	end	local Edition = A['Edition'];	local PublicationPlace = place_check (A['PublicationPlace'], A:ORIGIN('PublicationPlace'));	local Place = place_check (A['Place'], A:ORIGIN('Place'));	local PublisherName = A['PublisherName'];	local PublisherName_origin = A:ORIGIN('PublisherName');	if utilities.is_set (PublisherName) then	local i = 0;	PublisherName, i = utilities.strip_apostrophe_markup (PublisherName);	-- strip apostrophe markup so that metadata isn't contaminated; publisher is never italicized	if i then	-- non-zero when markup was stripped so emit an error message	table.insert( z.message_tail, {utilities.set_message ('err_apostrophe_markup', {PublisherName_origin}, true)});	end	end	local Newsgroup = A['Newsgroup'];	-- TODO: strip apostrophe markup?	local Newsgroup_origin = A:ORIGIN('Newsgroup');	if 'newsgroup' == config.CitationClass then	if utilities.is_set (PublisherName) then	-- general use parameter |publisher= not allowed in cite newsgroup	local error_text, error_state = utilities.set_message ('err_parameter_ignored', {PublisherName_origin}, true);	if utilities.is_set (error_text) then	table.insert( z.message_tail, {error_text, error_state} );	end	end	PublisherName = nil;	-- ensure that this parameter is unset for the time being; will be used again after COinS	end	local UrlAccess = is_valid_parameter_value (A['UrlAccess'], A:ORIGIN('UrlAccess'), cfg.keywords_lists['url-access'], nil);	if not utilities.is_set (URL) and utilities.is_set (UrlAccess) then	UrlAccess = nil;	table.insert( z.message_tail, { utilities.set_message ( 'err_param_access_requires_param', {'url'}, true ) } );	end	local ChapterUrlAccess = is_valid_parameter_value (A['ChapterUrlAccess'], A:ORIGIN('ChapterUrlAccess'), cfg.keywords_lists['url-access'], nil);	if not utilities.is_set (ChapterURL) and utilities.is_set (ChapterUrlAccess) then	ChapterUrlAccess = nil;	table.insert( z.message_tail, { utilities.set_message ( 'err_param_access_requires_param', {A:ORIGIN('ChapterUrlAccess'):gsub ('%-access', '')}, true ) } );	end	local MapUrlAccess = is_valid_parameter_value (A['MapUrlAccess'], A:ORIGIN('MapUrlAccess'), cfg.keywords_lists['url-access'], nil);	if not utilities.is_set (A['MapURL']) and utilities.is_set (MapUrlAccess) then	MapUrlAccess = nil;	table.insert( z.message_tail, { utilities.set_message ( 'err_param_access_requires_param', {'map-url'}, true ) } );	end	local Via = A['Via'];	local AccessDate = A['AccessDate'];	local Agency = A['Agency'];	local Language = A['Language'];	local Format = A['Format'];	local ChapterFormat = A['ChapterFormat'];	local DoiBroken = A['DoiBroken'];	local ID = A['ID'];	local ASINTLD = A['ASINTLD'];	local IgnoreISBN = is_valid_parameter_value (A['IgnoreISBN'], A:ORIGIN('IgnoreISBN'), cfg.keywords_lists['yes_true_y'], nil);	local Embargo = A['Embargo'];	local Class = A['Class'];	-- arxiv class identifier	local Quote = A['Quote'];	local QuotePage = A['QuotePage'];	local QuotePages = A['QuotePages'];	local ScriptQuote = A['ScriptQuote'];	local TransQuote = A['TransQuote'];	local LayFormat = A['LayFormat'];	local LayURL = A['LayURL'];	local LaySource = A['LaySource'];	local Transcript = A['Transcript'];	local TranscriptFormat = A['TranscriptFormat'];	local TranscriptURL = A['TranscriptURL']	local TranscriptURL_origin = A:ORIGIN('TranscriptURL');	-- get name of parameter that holds TranscriptURL	local LastAuthorAmp = is_valid_parameter_value (A['LastAuthorAmp'], A:ORIGIN('LastAuthorAmp'), cfg.keywords_lists['yes_true_y'], nil);	local no_tracking_cats = is_valid_parameter_value (A['NoTracking'], A:ORIGIN('NoTracking'), cfg.keywords_lists['yes_true_y'], nil);	if 'nocat' == A:ORIGIN('NoTracking') then	utilities.set_message ('maint_nocat');	-- this one so that we get the message; see main categorization at end of citation0()	end	--local variables that are not cs1 parameters	local use_lowercase;	-- controls capitalization of certain static text	local this_page = mw.title.getCurrentTitle();	-- also used for COinS and for language	local anchor_year;	-- used in the CITEREF identifier	local COinS_date = {};	-- holds date info extracted from |date= for the COinS metadata by Module:Date verification	local DF = is_valid_parameter_value (A['DF'], A:ORIGIN('DF'), cfg.keywords_lists['df'], '');	if not utilities.is_set (DF) then	DF = cfg.global_df;	-- local |df= if present overrides global df set by {{use xxx date}} template	end	local sepc;	-- separator between citation elements for CS1 a period, for CS2, a comma	local PostScript;	local Ref = A['Ref'];	if 'harv' == Ref then	utilities.set_message ('maint_ref_harv');	-- add maint cat to identify templates that have this now-extraneous param value	elseif not utilities.is_set (Ref) then	Ref = 'harv';	-- set as default when not set externally	end	sepc, PostScript, Ref = set_style (Mode:lower(), A['PostScript'], Ref, config.CitationClass);	use_lowercase = ( sepc == ',' );	-- used to control capitalization for certain static text	-- check this page to see if it is in one of the namespaces that cs1 is not supposed to add to the error categories	if not utilities.is_set (no_tracking_cats) then	-- ignore if we are already not going to categorize this page	if utilities.in_array (this_page.nsText, cfg.uncategorized_namespaces) then	no_tracking_cats = "true";	-- set no_tracking_cats	end	for _, v in ipairs (cfg.uncategorized_subpages) do	-- cycle through page name patterns	if this_page.text:match (v) then	-- test page name against each pattern	no_tracking_cats = "true";	-- set no_tracking_cats	break;	-- bail out if one is found	end	end	end	-- check for extra |page=, |pages= or |at= parameters. (also sheet and sheets while we're at it)	utilities.select_one (args, {'page', 'p', 'pp', 'pages', 'at', 'sheet', 'sheets'}, 'err_redundant_parameters');	-- this is a dummy call simply to get the error message and category	local coins_pages;	Page, Pages, At, coins_pages = insource_loc_get (Page, Pages, At);	local NoPP = is_valid_parameter_value (A['NoPP'], A:ORIGIN('NoPP'), cfg.keywords_lists['yes_true_y'], nil);	if utilities.is_set (PublicationPlace) and utilities.is_set (Place) then	-- both |publication-place= and |place= (|location=) allowed if different	utilities.add_prop_cat ('location test');	-- add property cat to evaluate how often PublicationPlace and Place are used together	if PublicationPlace == Place then	Place = '';	-- unset; don't need both if they are the same	end	elseif not utilities.is_set (PublicationPlace) and utilities.is_set (Place) then	-- when only |place= (|location=) is set ...	PublicationPlace = Place;	-- promote |place= (|location=) to |publication-place	end	if PublicationPlace == Place then Place = ''; end	-- don't need both if they are the same	--[[	Parameter remapping for cite encyclopedia:	When the citation has these parameters:	|encyclopedia= and |title= then map |title= to |article= and |encyclopedia= to |title=	|encyclopedia= and |article= then map |encyclopedia= to |title=	|trans-title= maps to |trans-chapter= when |title= is re-mapped	|url= maps to |chapter-url= when |title= is remapped	All other combinations of |encyclopedia=, |title=, and |article= are not modified	]]	local Encyclopedia = A['Encyclopedia'];	-- used as a flag by this module and by ~/COinS	if utilities.is_set (Encyclopedia) then	-- emit error message when Encyclopedia set but template is other than {{cite encyclopedia}} or {{citation}}	if 'encyclopaedia' ~= config.CitationClass and 'citation' ~= config.CitationClass then	table.insert (z.message_tail, {utilities.set_message ('err_parameter_ignored', {A:ORIGIN ('Encyclopedia')}, true)});	Encyclopedia = nil;	-- unset because not supported by this template	end	end	if ('encyclopaedia' == config.CitationClass) or ('citation' == config.CitationClass and utilities.is_set (Encyclopedia)) then	if utilities.is_set (Periodical) and utilities.is_set (Encyclopedia) then	-- when both set emit an error	table.insert (z.message_tail, {utilities.set_message ('err_redundant_parameters', {utilities.wrap_style ('parameter', A:ORIGIN ('Encyclopedia')) .. ' and ' .. utilities.wrap_style ('parameter', Periodical_origin)}, true )});	end	if utilities.is_set (Encyclopedia) then	Periodical = Encyclopedia;	-- error or no, set Periodical to Encyclopedia; allow periodical without encyclopedia	Periodical_origin = A:ORIGIN ('Encyclopedia');	end	if utilities.is_set (Periodical) then	-- Periodical is set when |encyclopedia= is set	if utilities.is_set (Title) or utilities.is_set (ScriptTitle) then	if not utilities.is_set (Chapter) then	Chapter = Title;	-- |encyclopedia= and |title= are set so map |title= to |article= and |encyclopedia= to |title=	ScriptChapter = ScriptTitle;	ScriptChapter_origin = A:ORIGIN('ScriptTitle')	TransChapter = TransTitle;	ChapterURL = URL;	ChapterURL_origin = A:ORIGIN('URL')	ChapterUrlAccess = UrlAccess;	if not utilities.is_set (ChapterURL) and utilities.is_set (TitleLink) then	Chapter = utilities.make_wikilink (TitleLink, Chapter);	end	Title = Periodical;	ChapterFormat = Format;	Periodical = '';	-- redundant so unset	TransTitle = '';	URL = '';	Format = '';	TitleLink = '';	ScriptTitle = '';	end	elseif utilities.is_set (Chapter) then	-- |title= not set	Title = Periodical;	-- |encyclopedia= set and |article= set so map |encyclopedia= to |title=	Periodical = '';	-- redundant so unset	end	end	end	-- special case for cite techreport.	if (config.CitationClass == "techreport") then	-- special case for cite techreport	if utilities.is_set (A['Number']) then	-- cite techreport uses 'number', which other citations alias to 'issue'	if not utilities.is_set (ID) then	-- can we use ID for the "number"?	ID = A['Number'];	-- yes, use it	else	-- ID has a value so emit error message	table.insert( z.message_tail, { utilities.set_message ('err_redundant_parameters', {utilities.wrap_style ('parameter', 'id') .. ' and ' .. utilities.wrap_style ('parameter', 'number')}, true )});	end	end	end	-- Account for the oddity that is {{cite conference}}, before generation of COinS data.	if 'conference' == config.CitationClass then	if utilities.is_set (BookTitle) then	Chapter = Title;	Chapter_origin = 'title';	--	ChapterLink = TitleLink;	-- |chapter-link= is deprecated	ChapterURL = URL;	ChapterUrlAccess = UrlAccess;	ChapterURL_origin = URL_origin;	URL_origin = '';	ChapterFormat = Format;	TransChapter = TransTitle;	TransChapter_origin = TransTitle_origin;	Title = BookTitle;	Format = '';	--	TitleLink = '';	TransTitle = '';	URL = '';	end	elseif 'speech' ~= config.CitationClass then	Conference = '';	-- not cite conference or cite speech so make sure this is empty string	end	-- cite map oddities	local Cartography = "";	local Scale = "";	local Sheet = A['Sheet'] or '';	local Sheets = A['Sheets'] or '';	if config.CitationClass == "map" then	if utilities.is_set (Chapter) then	table.insert( z.message_tail, { utilities.set_message ( 'err_redundant_parameters', {utilities.wrap_style ('parameter', 'map') .. ' and ' .. utilities.wrap_style ('parameter', Chapter_origin)}, true ) } );	-- add error message	end	Chapter = A['Map'];	Chapter_origin = A:ORIGIN('Map');	ChapterURL = A['MapURL'];	ChapterURL_origin = A:ORIGIN('MapURL');	TransChapter = A['TransMap'];	ScriptChapter = A['ScriptMap']	ScriptChapter_origin = A:ORIGIN('ScriptMap')	ChapterUrlAccess = MapUrlAccess;	ChapterFormat = A['MapFormat'];	Cartography = A['Cartography'];	if utilities.is_set ( Cartography ) then	Cartography = sepc .. " " .. wrap_msg ('cartography', Cartography, use_lowercase);	end	Scale = A['Scale'];	if utilities.is_set ( Scale ) then	Scale = sepc .. " " .. Scale;	end	end	-- Account for the oddities that are {{cite episode}} and {{cite serial}}, before generation of COinS data.	if 'episode' == config.CitationClass or 'serial' == config.CitationClass then	local SeriesLink = A['SeriesLink'];	SeriesLink = link_title_ok (SeriesLink, A:ORIGIN ('SeriesLink'), Series, 'series');	-- check for wiki-markup in |series-link= or wiki-markup in |series= when |series-link= is set	local Network = A['Network'];	local Station = A['Station'];	local s, n = {}, {};	-- do common parameters first	if utilities.is_set (Network) then table.insert(n, Network); end	if utilities.is_set (Station) then table.insert(n, Station); end	ID = table.concat(n, sepc .. ' ');	if 'episode' == config.CitationClass then	-- handle the oddities that are strictly {{cite episode}}	local Season = A['Season'];	local SeriesNumber = A['SeriesNumber'];	if utilities.is_set (Season) and utilities.is_set (SeriesNumber) then	-- these are mutually exclusive so if both are set	table.insert( z.message_tail, { utilities.set_message ( 'err_redundant_parameters', {utilities.wrap_style ('parameter', 'season') .. ' and ' .. utilities.wrap_style ('parameter', 'seriesno')}, true ) } );	-- add error message	SeriesNumber = '';	-- unset; prefer |season= over |seriesno=	end	-- assemble a table of parts concatenated later into Series	if utilities.is_set (Season) then table.insert(s, wrap_msg ('season', Season, use_lowercase)); end	if utilities.is_set (SeriesNumber) then table.insert(s, wrap_msg ('seriesnum', SeriesNumber, use_lowercase)); end	if utilities.is_set (Issue) then table.insert(s, wrap_msg ('episode', Issue, use_lowercase)); end	Issue = '';	-- unset because this is not a unique parameter	Chapter = Title;	-- promote title parameters to chapter	ScriptChapter = ScriptTitle;	ScriptChapter_origin = A:ORIGIN('ScriptTitle');	ChapterLink = TitleLink;	-- alias |episode-link=	TransChapter = TransTitle;	ChapterURL = URL;	ChapterUrlAccess = UrlAccess;	ChapterURL_origin = A:ORIGIN('URL');	Title = Series;	-- promote series to title	TitleLink = SeriesLink;	Series = table.concat(s, sepc .. ' ');	-- this is concatenation of season, seriesno, episode number	if utilities.is_set (ChapterLink) and not utilities.is_set (ChapterURL) then	-- link but not URL	Chapter = utilities.make_wikilink (ChapterLink, Chapter);	elseif utilities.is_set (ChapterLink) and utilities.is_set (ChapterURL) then	-- if both are set, URL links episode;	Series = utilities.make_wikilink (ChapterLink, Series);	end	URL = '';	-- unset	TransTitle = '';	ScriptTitle = '';	else	-- now oddities that are cite serial	Issue = '';	-- unset because this parameter no longer supported by the citation/core version of cite serial	Chapter = A['Episode'];	-- TODO: make |episode= available to cite episode someday?	if utilities.is_set (Series) and utilities.is_set (SeriesLink) then	Series = utilities.make_wikilink (SeriesLink, Series);	end	Series = utilities.wrap_style ('italic-title', Series);	-- series is italicized	end	end	-- end of {{cite episode}} stuff	-- handle type parameter for those CS1 citations that have default values	if utilities.in_array (config.CitationClass, {"AV-media-notes", "interview", "mailinglist", "map", "podcast", "pressrelease", "report", "techreport", "thesis"}) then	TitleType = set_titletype (config.CitationClass, TitleType);	if utilities.is_set (Degree) and "Thesis" == TitleType then	-- special case for cite thesis	TitleType = Degree .. ' ' .. cfg.title_types ['thesis']:lower();	end	end	if utilities.is_set (TitleType) then	-- if type parameter is specified	TitleType = utilities.substitute ( cfg.messages['type'], TitleType);	-- display it in parentheses	-- TODO: Hack on TitleType to fix bunched parentheses problem	end	-- legacy: promote PublicationDate to Date if neither Date nor Year are set.	local Date_origin;	-- to hold the name of parameter promoted to Date; required for date error messaging	if not utilities.is_set (Date) then	Date = Year;	-- promote Year to Date	Year = nil;	-- make nil so Year as empty string isn't used for CITEREF	if not utilities.is_set (Date) and utilities.is_set (PublicationDate) then	-- use PublicationDate when |date= and |year= are not set	Date = PublicationDate;	-- promote PublicationDate to Date	PublicationDate = '';	-- unset, no longer needed	Date_origin = A:ORIGIN('PublicationDate');	-- save the name of the promoted parameter	else	Date_origin = A:ORIGIN('Year');	-- save the name of the promoted parameter	end	else	Date_origin = A:ORIGIN('Date');	-- not a promotion; name required for error messaging	end	if PublicationDate == Date then PublicationDate = ''; end	-- if PublicationDate is same as Date, don't display in rendered citation	--[[	Go test all of the date-holding parameters for valid MOS:DATE format and make sure that dates are real dates. This must be done before we do COinS because here is where	we get the date used in the metadata.	Date validation supporting code is in Module:Citation/CS1/Date_validation	]]	do	-- create defined block to contain local variables error_message, date_parameters_list, mismatch	local error_message = '';	-- AirDate has been promoted to Date so not necessary to check it	local date_parameters_list = {	['access-date'] = {val = AccessDate, name = A:ORIGIN ('AccessDate')},	['archive-date'] = {val = ArchiveDate, name = A:ORIGIN ('ArchiveDate')},	['date'] = {val = Date, name = Date_origin},	['doi-broken-date'] = {val = DoiBroken, name = A:ORIGIN ('DoiBroken')},	['pmc-embargo-date'] = {val = Embargo, name = A:ORIGIN ('Embargo')},	['lay-date'] = {val = LayDate, name = A:ORIGIN ('LayDate')},	['publication-date'] = {val = PublicationDate, name = A:ORIGIN ('PublicationDate')},	['year'] = {val = Year, name = A:ORIGIN ('Year')},	};	local error_list = {};	anchor_year, Embargo = validation.dates(date_parameters_list, COinS_date, error_list); -- start temporary Julian / Gregorian calendar uncertainty categorization	if COinS_date.inter_cal_cat then	utilities.add_prop_cat ('jul_greg_uncertainty');	end -- end temporary Julian / Gregorian calendar uncertainty categorization	if utilities.is_set (Year) and utilities.is_set (Date) then	-- both |date= and |year= not normally needed;	local mismatch = validation.year_date_check (Year, Date);	if 0 == mismatch then	-- |year= does not match a year-value in |date=	table.insert (error_list, '<code class="cs1-code">&#124;year= / &#124;date= mismatch</code>');	elseif 1 == mismatch then	-- |year= matches year-value in |date=	utilities.set_message ('maint_date_year');	-- add a maint cat	end	end	if 0 == #error_list then	-- error free dates only; 0 when error_list is empty	local modified = false;	-- flag	if utilities.is_set (DF) then	-- if we need to reformat dates	modified = validation.reformat_dates (date_parameters_list, DF);	-- reformat to DF format, use long month names if appropriate	end	if true == validation.date_hyphen_to_dash (date_parameters_list) then	-- convert hyphens to dashes where appropriate	modified = true;	utilities.set_message ('maint_date_format');	-- hyphens were converted so add maint category	end	-- for those wikis that can and want to have English date names translated to the local language,	-- uncomment the next three lines. Not supported by en.wiki (for obvious reasons)	-- set validation.date_name_xlate() second argument to true to translate English digits to local digits (will translate ymd dates)	--	if validation.date_name_xlate (date_parameters_list, false) then	--	modified = true;	--	end	if modified then	-- if the date_parameters_list values were modified	AccessDate = date_parameters_list['access-date'].val;	-- overwrite date holding parameters with modified values	ArchiveDate = date_parameters_list['archive-date'].val;	Date = date_parameters_list['date'].val;	DoiBroken = date_parameters_list['doi-broken-date'].val;	LayDate = date_parameters_list['lay-date'].val;	PublicationDate = date_parameters_list['publication-date'].val;	end	else	table.insert (z.message_tail, {utilities.set_message ('err_bad_date', {utilities.make_sep_list (#error_list, error_list)}, true)});	-- add this error message	end	end	-- end of do	local ID_list_coins = identifiers.extract_ids (args);	-- gets identifiers and their values from args; this list used for COinS and source for build_id_list()	if utilities.is_set (DoiBroken) and not ID_list_coins['DOI'] then	table.insert (z.message_tail, {utilities.set_message ('err_doibroken_missing_doi', A:ORIGIN('DoiBroken'))});	end	local ID_access_levels = identifiers.extract_id_access_levels (args, ID_list_coins);	local ID_list = identifiers.build_id_list (ID_list_coins, {IdAccessLevels = ID_access_levels, DoiBroken = DoiBroken, ASINTLD = ASINTLD, IgnoreISBN = IgnoreISBN, Embargo = Embargo, Class = Class});	-- render identifiers	-- Account for the oddities that are {{cite arxiv}}, {{cite biorxiv}}, {{cite citeseerx}}, {{cite ssrn}}, before generation of COinS data.	if utilities.in_array (config.CitationClass, whitelist.preprint_template_list) then	if not utilities.is_set (ID_list_coins[config.CitationClass:upper()]) then	-- |arxiv= or |eprint= required for cite arxiv; |biorxiv= & |citeseerx= required for their templates	table.insert (z.message_tail, {utilities.set_message ('err_' .. config.CitationClass .. '_missing', {}, true)});	-- add error message	end	Periodical = ({['arxiv'] = 'arXiv', ['biorxiv'] = 'bioRxiv', ['citeseerx'] = 'CiteSeerX', ['ssrn'] = 'Social Science Research Network'})[config.CitationClass];	end	-- Link the title of the work if no |url= was provided, but we have a |pmc= or a |doi= with |doi-access=free	if config.CitationClass == "journal" and not utilities.is_set (URL) and not utilities.is_set (TitleLink) and not utilities.in_array (cfg.keywords_xlate[Title], {'off', 'none'}) then -- TODO: remove 'none' once existing citations have been switched to 'off', so 'none' can be used as token for "no title" instead	if 'none' ~= cfg.keywords_xlate[auto_select] then -- if auto-linking not disabled	if identifiers.auto_link_urls[auto_select] then -- manual selection	URL = identifiers.auto_link_urls[auto_select]; -- set URL to be the same as identifier's external link	URL_origin = cfg.id_handlers[auto_select:upper()].parameters[1]; -- set URL_origin to parameter name for use in error message if citation is missing a |title=	elseif identifiers.auto_link_urls['pmc'] then -- auto-select PMC	URL = identifiers.auto_link_urls['pmc']; -- set URL to be the same as the PMC external link if not embargoed	URL_origin = cfg.id_handlers['PMC'].parameters[1]; -- set URL_origin to parameter name for use in error message if citation is missing a |title=	elseif identifiers.auto_link_urls['doi'] then -- auto-select DOI	URL = identifiers.auto_link_urls['doi'];	URL_origin = cfg.id_handlers['DOI'].parameters[1];	end	end	if utilities.is_set (URL) and utilities.is_set (AccessDate) then	-- access date requires |url=; identifier-created URL is not |url=	table.insert( z.message_tail, { utilities.set_message ( 'err_accessdate_missing_url', {}, true ) } );	-- add an error message	AccessDate = '';	-- unset	end	end	-- At this point fields may be nil if they weren't specified in the template use. We can use that fact.	-- Test if citation has no title	if	not utilities.is_set (Title) and not utilities.is_set (TransTitle) and not utilities.is_set (ScriptTitle) then	-- has special case for cite episode	table.insert( z.message_tail, { utilities.set_message ( 'err_citation_missing_title', {'episode' == config.CitationClass and 'series' or 'title'}, true ) } );	end	if utilities.in_array (cfg.keywords_xlate[Title], {'off', 'none'}) and	utilities.in_array (config.CitationClass, {'journal', 'citation'}) and	(utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)) and	('journal' == Periodical_origin or 'script-journal' == ScriptPeriodical_origin) then	-- special case for journal cites	Title = '';	-- set title to empty string	utilities.set_message ('maint_untitled');	-- add maint cat	end	check_for_url ({	-- add error message when any of these parameters hold a URL	['title']=Title,	[A:ORIGIN('Chapter')]=Chapter,	[Periodical_origin] = Periodical,	[PublisherName_origin] = PublisherName	});	-- COinS metadata (see <http://ocoins.info/>) for automated parsing of citation information.	-- handle the oddity that is cite encyclopedia and {{citation |encyclopedia=something}}. Here we presume that	-- when Periodical, Title, and Chapter are all set, then Periodical is the book (encyclopedia) title, Title	-- is the article title, and Chapter is a section within the article. So, we remap	local coins_chapter = Chapter;	-- default assuming that remapping not required	local coins_title = Title;	-- et tu	if 'encyclopaedia' == config.CitationClass or ('citation' == config.CitationClass and utilities.is_set (Encyclopedia)) then	if utilities.is_set (Chapter) and utilities.is_set (Title) and utilities.is_set (Periodical) then	-- if all are used then	coins_chapter = Title;	-- remap	coins_title = Periodical;	end	end	local coins_author = a;	-- default for coins rft.au	if 0 < #c then	-- but if contributor list	coins_author = c;	-- use that instead	end	-- this is the function call to COinS()	local OCinSoutput = metadata.COinS({	['Periodical'] = utilities.strip_apostrophe_markup (Periodical),	-- no markup in the metadata	['Encyclopedia'] = Encyclopedia,	-- just a flag; content ignored by ~/COinS	['Chapter'] = metadata.make_coins_title (coins_chapter, ScriptChapter),	-- Chapter and ScriptChapter stripped of bold / italic wiki-markup	['Degree'] = Degree;	-- cite thesis only	['Title'] = metadata.make_coins_title (coins_title, ScriptTitle),	-- Title and ScriptTitle stripped of bold / italic wiki-markup	['PublicationPlace'] = PublicationPlace,	['Date'] = COinS_date.rftdate,	-- COinS_date has correctly formatted date if Date is valid;	['Season'] = COinS_date.rftssn,	['Quarter'] = COinS_date.rftquarter,	['Chron'] = COinS_date.rftchron or (not COinS_date.rftdate and Date) or '',	-- chron but if not set and invalid date format use Date; keep this last bit?	['Series'] = Series,	['Volume'] = Volume,	['Issue'] = Issue,	['Pages'] = coins_pages or metadata.get_coins_pages (first_set ({Sheet, Sheets, Page, Pages, At}, 5)),	-- pages stripped of external links	['Edition'] = Edition,	['PublisherName'] = PublisherName or Newsgroup,	-- any apostrophe markup already removed from PublisherName	['URL'] = first_set ({ChapterURL, URL}, 2),	['Authors'] = coins_author,	['ID_list'] = ID_list_coins,	['RawPage'] = this_page.prefixedText,	}, config.CitationClass);	-- Account for the oddities that are {{cite arxiv}}, {{cite biorxiv}}, {{cite citeseerx}}, and {{cite ssrn}} AFTER generation of COinS data.	if utilities.in_array (config.CitationClass, whitelist.preprint_template_list) then	-- we have set rft.jtitle in COinS to arXiv, bioRxiv, CiteSeerX, or ssrn now unset so it isn't displayed	Periodical = '';	-- periodical not allowed in these templates; if article has been published, use cite journal	end	-- special case for cite newsgroup. Do this after COinS because we are modifying Publishername to include some static text	if 'newsgroup' == config.CitationClass and utilities.is_set (Newsgroup) then	PublisherName = utilities.substitute (cfg.messages['newsgroup'], external_link( 'news:' .. Newsgroup, Newsgroup, Newsgroup_origin, nil ));	end	-- Now perform various field substitutions.	-- We also add leading spaces and surrounding markup and punctuation to the	-- various parts of the citation, but only when they are non-nil.	local EditorCount;	-- used only for choosing {ed.) or (eds.) annotation at end of editor name-list	do	local last_first_list;	local control = {	format = NameListStyle,	-- empty string or 'vanc'	maximum = nil,	-- as if display-authors or display-editors not set	lastauthoramp = LastAuthorAmp,	mode = Mode	};	do	-- do editor name list first because the now unsupported coauthors used to modify control table	control.maximum , editor_etal = get_display_names (A['DisplayEditors'], #e, 'editors', editor_etal);	last_first_list, EditorCount = list_people(control, e, editor_etal);	if utilities.is_set (Editors) then	Editors, editor_etal = name_has_etal (Editors, editor_etal, false, 'editors');	-- find and remove variations on et al.	if editor_etal then	Editors = Editors .. ' ' .. cfg.messages['et al'];	-- add et al. to editors parameter beause |display-editors=etal	end	EditorCount = 2;	-- we don't know but assume |editors= is multiple names; spoof to display (eds.) annotation	else	Editors = last_first_list;	-- either an author name list or an empty string	end	if 1 == EditorCount and (true == editor_etal or 1 < #e) then	-- only one editor displayed but includes etal then	EditorCount = 2;	-- spoof to display (eds.) annotation	end	end	do	-- now do interviewers	control.maximum , interviewer_etal = get_display_names (A['DisplayInterviewers'], #interviewers_list, 'interviewers', interviewer_etal);	Interviewers = list_people (control, interviewers_list, interviewer_etal);	end	do	-- now do translators	control.maximum , translator_etal = get_display_names (A['DisplayTranslators'], #t, 'translators', translator_etal);	Translators = list_people (control, t, translator_etal);	end	do	-- now do contributors	control.maximum , contributor_etal = get_display_names (A['DisplayContributors'], #c, 'contributors', contributor_etal);	Contributors = list_people (control, c, contributor_etal);	end	do	-- now do authors	control.maximum , author_etal = get_display_names (A['DisplayAuthors'], #a, 'authors', author_etal);	last_first_list = list_people(control, a, author_etal);	if utilities.is_set (Authors) then	Authors, author_etal = name_has_etal (Authors, author_etal, false, 'authors');	-- find and remove variations on et al.	if author_etal then	Authors = Authors .. ' ' .. cfg.messages['et al'];	-- add et al. to authors parameter	end	else	Authors = last_first_list;	-- either an author name list or an empty string	end	end	-- end of do	if utilities.is_set (Authors) and utilities.is_set (Collaboration) then	Authors = Authors .. ' (' .. Collaboration .. ')';	-- add collaboration after et al.	end	end	-- apply |[xx-]format= styling; at the end, these parameters hold correctly styled format annotation,	-- an error message if the associated URL is not set, or an empty string for concatenation	ArchiveFormat = style_format (ArchiveFormat, ArchiveURL, 'archive-format', 'archive-url');	ConferenceFormat = style_format (ConferenceFormat, ConferenceURL, 'conference-format', 'conference-url');	Format = style_format (Format, URL, 'format', 'url');	LayFormat = style_format (LayFormat, LayURL, 'lay-format', 'lay-url');	TranscriptFormat = style_format (TranscriptFormat, TranscriptURL, 'transcript-format', 'transcripturl');	-- special case for chapter format so no error message or cat when chapter not supported	if not (utilities.in_array (config.CitationClass, {'web', 'news', 'journal', 'magazine', 'pressrelease', 'podcast', 'newsgroup', 'arxiv', 'biorxiv', 'citeseerx', 'ssrn'}) or	('citation' == config.CitationClass and (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)) and not utilities.is_set (Encyclopedia))) then	ChapterFormat = style_format (ChapterFormat, ChapterURL, 'chapter-format', 'chapter-url');	end	if not utilities.is_set (URL) then	if utilities.in_array (config.CitationClass, {"web", "podcast", "mailinglist"}) or	-- |url= required for cite web, cite podcast, and cite mailinglist	('citation' == config.CitationClass and ('website' == Periodical_origin or 'script-website' == ScriptPeriodical_origin)) then	-- and required for {{citation}} with |website= or |script-website=	table.insert( z.message_tail, { utilities.set_message ( 'err_cite_web_url', {}, true ) } );	end	-- do we have |accessdate= without either |url= or |chapter-url=?	if utilities.is_set (AccessDate) and not utilities.is_set (ChapterURL) then	-- ChapterURL may be set when URL is not set;	table.insert( z.message_tail, { utilities.set_message ( 'err_accessdate_missing_url', {}, true ) } );	AccessDate = '';	end	end	local OriginalURL, OriginalURL_origin, OriginalFormat, OriginalAccess;	UrlStatus = UrlStatus:lower();	-- used later when assembling archived text	if utilities.is_set ( ArchiveURL ) then	if utilities.is_set (ChapterURL) then	-- if chapter-url= is set apply archive url to it	OriginalURL = ChapterURL;	-- save copy of source chapter's url for archive text	OriginalURL_origin = ChapterURL_origin;	-- name of |chapter-url= parameter for error messages	OriginalFormat = ChapterFormat;	-- and original |chapter-format=	if 'live' ~= UrlStatus then	ChapterURL = ArchiveURL	-- swap-in the archive's URL	ChapterURL_origin = A:ORIGIN('ArchiveURL')	-- name of |archive-url= parameter for error messages	ChapterFormat = ArchiveFormat or '';	-- swap in archive's format	ChapterUrlAccess = nil;	-- restricted access levels do not make sense for archived URLs	end	elseif utilities.is_set (URL) then	OriginalURL = URL;	-- save copy of original source URL	OriginalURL_origin = URL_origin;	-- name of URL parameter for error messages	OriginalFormat = Format;	-- and original |format=	OriginalAccess = UrlAccess;	if 'live' ~= UrlStatus then	-- if URL set then |archive-url= applies to it	URL = ArchiveURL	-- swap-in the archive's URL	URL_origin = A:ORIGIN('ArchiveURL')	-- name of archive URL parameter for error messages	Format = ArchiveFormat or '';	-- swap in archive's format	UrlAccess = nil;	-- restricted access levels do not make sense for archived URLs	end	end	end	if utilities.in_array (config.CitationClass, {'web', 'news', 'journal', 'magazine', 'pressrelease', 'podcast', 'newsgroup', 'arxiv', 'biorxiv', 'citeseerx', 'ssrn'}) or	-- if any of the 'periodical' cites except encyclopedia	('citation' == config.CitationClass and (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)) and not utilities.is_set (Encyclopedia)) then	local chap_param;	if utilities.is_set (Chapter) then	-- get a parameter name from one of these chapter related meta-parameters	chap_param = A:ORIGIN ('Chapter')	elseif utilities.is_set (TransChapter) then	chap_param = A:ORIGIN ('TransChapter')	elseif utilities.is_set (ChapterURL) then	chap_param = A:ORIGIN ('ChapterURL')	elseif utilities.is_set (ScriptChapter) then	chap_param = ScriptChapter_origin;	else utilities.is_set (ChapterFormat)	chap_param = A:ORIGIN ('ChapterFormat')	end	if utilities.is_set (chap_param) then	-- if we found one	table.insert( z.message_tail, { utilities.set_message ( 'err_chapter_ignored', {chap_param}, true ) } );	-- add error message	Chapter = '';	-- and set them to empty string to be safe with concatenation	TransChapter = '';	ChapterURL = '';	ScriptChapter = '';	ChapterFormat = '';	end	else	-- otherwise, format chapter / article title	local no_quotes = false;	-- default assume that we will be quoting the chapter parameter value	if utilities.is_set (Contribution) and 0 < #c then	-- if this is a contribution with contributor(s)	if utilities.in_array (Contribution:lower(), cfg.keywords_lists.contribution) then	-- and a generic contribution title	no_quotes = true;	-- then render it unquoted	end	end	Chapter = format_chapter_title (ScriptChapter, ScriptChapter_origin, Chapter, Chapter_origin, TransChapter, TransChapter_origin, ChapterURL, ChapterURL_origin, no_quotes, ChapterUrlAccess);	-- Contribution is also in Chapter	if utilities.is_set (Chapter) then	Chapter = Chapter .. ChapterFormat ;	if 'map' == config.CitationClass and utilities.is_set (TitleType) then	Chapter = Chapter .. ' ' .. TitleType;	-- map annotation here; not after title	end	Chapter = Chapter .. sepc .. ' ';	elseif utilities.is_set (ChapterFormat) then	-- |chapter= not set but |chapter-format= is so ...	Chapter = ChapterFormat .. sepc .. ' ';	-- ... ChapterFormat has error message, we want to see it	end	end	-- Format main title	local plain_title = false;	local accept_title;	Title, accept_title = utilities.has_accept_as_written (Title, true);	-- remove accept-this-as-written markup when it wraps all of <Title>	if accept_title and ('' == Title) then	-- only support forced empty for now "(())"	Title = cfg.messages['notitle'];	-- replace by predefined "No title" message	-- TODO: utilities.set_message ( 'err_redundant_parameters', ...);	-- issue proper error message instead of muting	ScriptTitle = '';	-- just mute for now	TransTitle = '';	-- just mute for now	plain_title = true;	-- suppress text decoration for descriptive title	utilities.set_message ('maint_untitled');	-- add maint cat	end	if not accept_title then -- <Title> not wrapped in accept-as-written markup	if '...' == Title:sub (-3) then	-- if ellipsis is the last three characters of |title=	Title = Title:gsub ('(%.%.%.)%.+$', '%1');	-- limit the number of dots to three	elseif not mw.ustring.find (Title, '%.%s*%a%.$') and	-- end of title is not a 'dot-(optional space-)letter-dot' initialism ...	not mw.ustring.find (Title, '%s+%a%.$') then	-- ...and not a 'space-letter-dot' initial (''Allium canadense'' L.)	Title = mw.ustring.gsub(Title, '%' .. sepc .. '$', '');	-- remove any trailing separator character; sepc and ms.ustring() here for languages that use multibyte separator characters	end	if utilities.is_set (ArchiveURL) and is_archived_copy (Title) then	utilities.set_message ('maint_archived_copy');	-- add maintenance category before we modify the content of Title	end	if is_generic_title (Title) then	table.insert (z.message_tail, {utilities.set_message ( 'err_generic_title', {}, true ) } );	-- set an error message	end	end	if (not plain_title) and (utilities.in_array (config.CitationClass, {'web', 'news', 'journal', 'magazine', 'pressrelease', 'podcast', 'newsgroup', 'mailinglist', 'interview', 'arxiv', 'biorxiv', 'citeseerx', 'ssrn'}) or	('citation' == config.CitationClass and (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)) and not utilities.is_set (Encyclopedia)) or	('map' == config.CitationClass and (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical)))) then	-- special case for cite map when the map is in a periodical treat as an article	Title = kern_quotes (Title);	-- if necessary, separate title's leading and trailing quote marks from module provided quote marks	Title = utilities.wrap_style ('quoted-title', Title);	Title = script_concatenate (Title, ScriptTitle, 'script-title');	-- <bdi> tags, lang attribute, categorization, etc.; must be done after title is wrapped	TransTitle = utilities.wrap_style ('trans-quoted-title', TransTitle );	elseif plain_title or ('report' == config.CitationClass) then	-- no styling for cite report and descriptive titles (otherwise same as above)	Title = script_concatenate (Title, ScriptTitle, 'script-title');	-- <bdi> tags, lang attribute, categorization, etc.; must be done after title is wrapped	TransTitle = utilities.wrap_style ('trans-quoted-title', TransTitle );	-- for cite report, use this form for trans-title	else	Title = utilities.wrap_style ('italic-title', Title);	Title = script_concatenate (Title, ScriptTitle, 'script-title');	-- <bdi> tags, lang attribute, categorization, etc.; must be done after title is wrapped	TransTitle = utilities.wrap_style ('trans-italic-title', TransTitle);	end	local TransError = "";	if utilities.is_set (TransTitle) then	if utilities.is_set (Title) then	TransTitle = " " .. TransTitle;	else	TransError = " " .. utilities.set_message ( 'err_trans_missing_title', {'title'} );	end	end	if utilities.is_set (Title) then	-- TODO: is this the right place to be making Wikisource URLs?	if utilities.is_set (TitleLink) and utilities.is_set (URL) then	table.insert( z.message_tail, { utilities.set_message ( 'err_wikilink_in_url', {}, true ) } );	-- set an error message because we can't have both	TitleLink = '';	-- unset	end	if not utilities.is_set (TitleLink) and utilities.is_set (URL) then	Title = external_link (URL, Title, URL_origin, UrlAccess) .. TransTitle .. TransError .. Format;	URL = '';	-- unset these because no longer needed	Format = "";	elseif utilities.is_set (TitleLink) and not utilities.is_set (URL) then	local ws_url;	ws_url = wikisource_url_make (TitleLink);	-- ignore ws_label return; not used here	if ws_url then	Title = external_link (ws_url, Title .. '&nbsp;', 'ws link in title-link');	-- space char after Title to move icon away from italic text; TODO: a better way to do this?	Title = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], TitleLink, Title});	Title = Title .. TransTitle .. TransError;	else	Title = utilities.make_wikilink (TitleLink, Title) .. TransTitle .. TransError;	end	else	local ws_url, ws_label, L;	-- Title has italic or quote markup by the time we get here which causes is_wikilink() to return 0 (not a wikilink)	ws_url, ws_label, L = wikisource_url_make (Title:gsub('[\'"](.-)[\'"]', '%1'));	-- make ws URL from |title= interwiki link (strip italic or quote markup); link portion L becomes tooltip label	if ws_url then	Title = Title:gsub ('%b[]', ws_label);	-- replace interwiki link with ws_label to retain markup	Title = external_link (ws_url, Title .. '&nbsp;', 'ws link in title');	-- space char after Title to move icon away from italic text; TODO: a better way to do this?	Title = utilities.substitute (cfg.presentation['interwiki-icon'], {cfg.presentation['class-wikisource'], L, Title});	Title = Title .. TransTitle .. TransError;	else	Title = Title .. TransTitle .. TransError;	end	end	else	Title = TransTitle .. TransError;	end	if utilities.is_set (Place) then	Place = " " .. wrap_msg ('written', Place, use_lowercase) .. sepc .. " ";	end	if utilities.is_set (Conference) then	if utilities.is_set (ConferenceURL) then	Conference = external_link( ConferenceURL, Conference, ConferenceURL_origin, nil );	end	Conference = sepc .. " " .. Conference .. ConferenceFormat;	elseif utilities.is_set (ConferenceURL) then	Conference = sepc .. " " .. external_link( ConferenceURL, nil, ConferenceURL_origin, nil );	end	if not utilities.is_set (Position) then	local Minutes = A['Minutes'];	local Time = A['Time'];	if utilities.is_set (Minutes) then	if utilities.is_set (Time) then	table.insert( z.message_tail, { utilities.set_message ( 'err_redundant_parameters', {utilities.wrap_style ('parameter', 'minutes') .. ' and ' .. utilities.wrap_style ('parameter', 'time')}, true ) } );	end	Position = " " .. Minutes .. " " .. cfg.messages['minutes'];	else	if utilities.is_set (Time) then	local TimeCaption = A['TimeCaption']	if not utilities.is_set (TimeCaption) then	TimeCaption = cfg.messages['event'];	if sepc ~= '.' then	TimeCaption = TimeCaption:lower();	end	end	Position = " " .. TimeCaption .. " " .. Time;	end	end	else	Position = " " .. Position;	At = '';	end	Page, Pages, Sheet, Sheets = format_pages_sheets (Page, Pages, Sheet, Sheets, config.CitationClass, Periodical_origin, sepc, NoPP, use_lowercase);	At = utilities.is_set (At) and (sepc .. " " .. At) or "";	Position = utilities.is_set (Position) and (sepc .. " " .. Position) or "";	if config.CitationClass == 'map' then	local Sections = A['Sections'];	-- Section (singular) is an alias of Chapter so set earlier	local Inset = A['Inset'];	if utilities.is_set ( Inset ) then	Inset = sepc .. " " .. wrap_msg ('inset', Inset, use_lowercase);	end	if utilities.is_set ( Sections ) then	Section = sepc .. " " .. wrap_msg ('sections', Sections, use_lowercase);	elseif utilities.is_set ( Section ) then	Section = sepc .. " " .. wrap_msg ('section', Section, use_lowercase);	end	At = At .. Inset .. Section;	end	if utilities.is_set (Language) then	Language = language_parameter (Language);	-- format, categories, name from ISO639-1, etc.	else	Language="";	-- language not specified so make sure this is an empty string;	--[[ TODO: need to extract the wrap_msg from language_parameter	so that we can solve parentheses bunching problem with Format/Language/TitleType	]]	end	Others = utilities.is_set (Others) and (sepc .. " " .. Others) or "";	if utilities.is_set (Translators) then	Others = safe_join ({sepc .. ' ', wrap_msg ('translated', Translators, use_lowercase), Others}, sepc);	end	if utilities.is_set (Interviewers) then	Others = safe_join ({sepc .. ' ', wrap_msg ('interview', Interviewers, use_lowercase), Others}, sepc);	end	TitleNote = utilities.is_set (TitleNote) and (sepc .. " " .. TitleNote) or "";	if utilities.is_set (Edition) then	if Edition:match ('%f[%a][Ee]d%.?$') or Edition:match ('%f[%a][Ee]dition$') then	utilities.set_message ('maint_extra_text', 'edition');	-- add maint cat	end	Edition = " " .. wrap_msg ('edition', Edition);	else	Edition = '';	end	Series = utilities.is_set (Series) and wrap_msg ('series', {sepc, Series}) or "";	-- not the same as SeriesNum	OrigDate = utilities.is_set (OrigDate) and wrap_msg ('origdate', OrigDate) or '';	Agency = utilities.is_set (Agency) and wrap_msg ('agency', {sepc, Agency}) or "";	Volume = format_volume_issue (Volume, Issue, config.CitationClass, Periodical_origin, sepc, use_lowercase);	------------------------------------ totally unrelated data	Via = utilities.is_set (Via) and wrap_msg ('via', Via) or '';	if utilities.is_set (AccessDate) then	local retrv_text = " " .. cfg.messages['retrieved']	AccessDate = nowrap_date (AccessDate);	-- wrap in nowrap span if date in appropriate format	if (sepc ~= ".") then retrv_text = retrv_text:lower() end	-- if mode is cs2, lower case	AccessDate = utilities.substitute (retrv_text, AccessDate);	-- add retrieved text	AccessDate = utilities.substitute (cfg.presentation['accessdate'], {sepc, AccessDate});	-- allow editors to hide accessdates	end	if utilities.is_set (ID) then ID = sepc .. " " .. ID; end	if "thesis" == config.CitationClass and utilities.is_set (Docket) then	ID = sepc .. " Docket " .. Docket .. ID;	end	if "report" == config.CitationClass and utilities.is_set (Docket) then	-- for cite report when |docket= is set	ID = sepc .. ' ' .. Docket;	-- overwrite ID even if |id= is set	end	if utilities.is_set (URL) then	URL = " " .. external_link( URL, nil, URL_origin, UrlAccess );	end	if utilities.is_set (Quote) or utilities.is_set (TransQuote) or utilities.is_set (ScriptQuote) then	if utilities.is_set (Quote) then	if Quote:sub(1, 1) == '"' and Quote:sub(-1, -1) == '"' then	-- if first and last characters of quote are quote marks	Quote = Quote:sub(2, -2);	-- strip them off	end	end	Quote = utilities.wrap_style ('quoted-text', Quote );	-- wrap in <q>...</q> tags	if utilities.is_set (ScriptQuote) then	Quote = script_concatenate (Quote, ScriptQuote, 'script-quote'); -- <bdi> tags, lang attribute, categorization, etc.; must be done after quote is wrapped	end	if utilities.is_set (TransQuote) then	if TransQuote:sub(1, 1) == '"' and TransQuote:sub(-1, -1) == '"' then -- if first and last characters of |trans-quote are quote marks	TransQuote = TransQuote:sub(2, -2); -- strip them off	end	Quote = Quote .. " " .. utilities.wrap_style ('trans-quoted-title', TransQuote );	end	if utilities.is_set (QuotePage) or utilities.is_set (QuotePages) then	-- add page prefix	local quote_prefix = '';	if utilities.is_set (QuotePage) then	if not NoPP then	quote_prefix = utilities.substitute (cfg.messages['p-prefix'], {sepc, QuotePage}), '', '', '';	else	quote_prefix = utilities.substitute (cfg.messages['nopp'], {sepc, QuotePage}), '', '', '';	end	elseif utilities.is_set (QuotePages) then	if tonumber(QuotePages) ~= nil and not NoPP then	-- if only digits, assume single page	quote_prefix = utilities.substitute (cfg.messages['p-prefix'], {sepc, QuotePages}), '', '';	elseif not NoPP then	quote_prefix = utilities.substitute (cfg.messages['pp-prefix'], {sepc, QuotePages}), '', '';	else	quote_prefix = utilities.substitute (cfg.messages['nopp'], {sepc, QuotePages}), '', '';	end	end	Quote = quote_prefix .. ": " .. Quote;	else	Quote = sepc .. " " .. Quote;	end	PostScript = "";	-- cs1|2 does not supply terminal punctuation when |quote= is set	end	local Archived	if utilities.is_set (ArchiveURL) then	local arch_text;	if not utilities.is_set (ArchiveDate) then	ArchiveDate = utilities.set_message ('err_archive_missing_date');	end	if "live" == UrlStatus then	arch_text = cfg.messages['archived'];	if sepc ~= "." then arch_text = arch_text:lower() end	Archived = sepc .. " " .. utilities.substitute ( cfg.messages['archived-live'],	{ external_link( ArchiveURL, arch_text, A:ORIGIN('ArchiveURL'), nil ) .. ArchiveFormat, ArchiveDate } );	if not utilities.is_set (OriginalURL) then	Archived = Archived .. " " .. utilities.set_message ('err_archive_missing_url');	end	elseif utilities.is_set (OriginalURL) then	-- UrlStatus is empty, 'dead', 'unfit', 'usurped', 'bot: unknown'	if utilities.in_array (UrlStatus, {'unfit', 'usurped', 'bot: unknown'}) then	arch_text = cfg.messages['archived-unfit'];	if sepc ~= "." then arch_text = arch_text:lower() end	Archived = sepc .. " " .. arch_text .. ArchiveDate;	-- format already styled	if 'bot: unknown' == UrlStatus then	utilities.set_message ('maint_bot_unknown');	-- and add a category if not already added	else	utilities.set_message ('maint_unfit');	-- and add a category if not already added	end	else	-- UrlStatus is empty, 'dead'	arch_text = cfg.messages['archived-dead'];	if sepc ~= "." then arch_text = arch_text:lower() end	Archived = sepc .. " " .. utilities.substitute ( arch_text,	{ external_link( OriginalURL, cfg.messages['original'], OriginalURL_origin, OriginalAccess ) .. OriginalFormat, ArchiveDate } );	-- format already styled	end	else	-- OriginalUrl not set	arch_text = cfg.messages['archived-missing'];	if sepc ~= "." then arch_text = arch_text:lower() end	Archived = sepc .. " " .. utilities.substitute ( arch_text,	{ utilities.set_message ('err_archive_missing_url'), ArchiveDate } );	end	elseif utilities.is_set (ArchiveFormat) then	Archived = ArchiveFormat;	-- if set and ArchiveURL not set ArchiveFormat has error message	else	Archived = ""	end	local Lay = '';	if utilities.is_set (LayURL) then	if utilities.is_set (LayDate) then LayDate = " (" .. LayDate .. ")" end	if utilities.is_set (LaySource) then	LaySource = " &ndash; ''" .. utilities.safe_for_italics (LaySource) .. "''";	else	LaySource = "";	end	if sepc == '.' then	Lay = sepc .. " " .. external_link( LayURL, cfg.messages['lay summary'], A:ORIGIN('LayURL'), nil ) .. LayFormat .. LaySource .. LayDate	else	Lay = sepc .. " " .. external_link( LayURL, cfg.messages['lay summary']:lower(), A:ORIGIN('LayURL'), nil ) .. LayFormat .. LaySource .. LayDate	end	elseif utilities.is_set (LayFormat) then	-- Test if |lay-format= is given without giving a |lay-url=	Lay = sepc .. LayFormat;	-- if set and LayURL not set, then LayFormat has error message	end	if utilities.is_set (Transcript) then	if utilities.is_set (TranscriptURL) then	Transcript = external_link( TranscriptURL, Transcript, TranscriptURL_origin, nil );	end	Transcript = sepc .. ' ' .. Transcript .. TranscriptFormat;	elseif utilities.is_set (TranscriptURL) then	Transcript = external_link( TranscriptURL, nil, TranscriptURL_origin, nil );	end	local Publisher;	if utilities.is_set (PublicationDate) then	PublicationDate = wrap_msg ('published', PublicationDate);	end	if utilities.is_set (PublisherName) then	if utilities.is_set (PublicationPlace) then	Publisher = sepc .. " " .. PublicationPlace .. ": " .. PublisherName .. PublicationDate;	else	Publisher = sepc .. " " .. PublisherName .. PublicationDate;	end	elseif utilities.is_set (PublicationPlace) then	Publisher= sepc .. " " .. PublicationPlace .. PublicationDate;	else	Publisher = PublicationDate;	end	-- Several of the above rely upon detecting this as nil, so do it last.	if (utilities.is_set (Periodical) or utilities.is_set (ScriptPeriodical) or utilities.is_set (TransPeriodical)) then	if utilities.is_set (Title) or utilities.is_set (TitleNote) then	Periodical = sepc .. " " .. format_periodical (ScriptPeriodical, ScriptPeriodical_origin, Periodical, TransPeriodical, TransPeriodical_origin);	else	Periodical = format_periodical (ScriptPeriodical, ScriptPeriodical_origin, Periodical, TransPeriodical, TransPeriodical_origin);	end	end	--[[	Handle the oddity that is cite speech. This code overrides whatever may be the value assigned to TitleNote (through |department=) and forces it to be " (Speech)" so that	the annotation directly follows the |title= parameter value in the citation rather than the |event= parameter value (if provided).	]]	if "speech" == config.CitationClass then	-- cite speech only	TitleNote = " (Speech)";	-- annotate the citation	if utilities.is_set (Periodical) then	-- if Periodical, perhaps because of an included |website= or |journal= parameter	if utilities.is_set (Conference) then	-- and if |event= is set	Conference = Conference .. sepc .. " ";	-- then add appropriate punctuation to the end of the Conference variable before rendering	end	end	end	-- Piece all bits together at last. Here, all should be non-nil.	-- We build things this way because it is more efficient in LUA	-- not to keep reassigning to the same string variable over and over.	local tcommon;	local tcommon2;	-- used for book cite when |contributor= is set	if utilities.in_array (config.CitationClass, {"journal", "citation"}) and utilities.is_set (Periodical) then	if utilities.is_set (Others) then Others = safe_join ({Others, sepc .. " "}, sepc) end	-- add terminal punctuation & space; check for dup sepc; TODO why do we need to do this here?	tcommon = safe_join( {Others, Title, TitleNote, Conference, Periodical, Format, TitleType, Series, Language, Edition, Publisher, Agency, Volume}, sepc );	elseif utilities.in_array (config.CitationClass, {"book", "citation"}) and not utilities.is_set (Periodical) then	-- special cases for book cites	if utilities.is_set (Contributors) then	-- when we are citing foreword, preface, introduction, etc.	tcommon = safe_join( {Title, TitleNote}, sepc );	-- author and other stuff will come after this and before tcommon2	tcommon2 = safe_join( {Conference, Periodical, Format, TitleType, Series, Language, Volume, Others, Edition, Publisher, Agency}, sepc );	else	tcommon = safe_join( {Title, TitleNote, Conference, Periodical, Format, TitleType, Series, Language, Volume, Others, Edition, Publisher, Agency}, sepc );	end	elseif 'map' == config.CitationClass then	-- special cases for cite map	if utilities.is_set (Chapter) then	-- map in a book; TitleType is part of Chapter	tcommon = safe_join( {Title, Format, Edition, Scale, Series, Language, Cartography, Others, Publisher, Volume}, sepc );	elseif utilities.is_set (Periodical) then	-- map in a periodical	tcommon = safe_join( {Title, TitleType, Format, Periodical, Scale, Series, Language, Cartography, Others, Publisher, Volume}, sepc );	else	-- a sheet or stand-alone map	tcommon = safe_join( {Title, TitleType, Format, Edition, Scale, Series, Language, Cartography, Others, Publisher}, sepc );	end	elseif 'episode' == config.CitationClass then	-- special case for cite episode	tcommon = safe_join( {Title, TitleNote, TitleType, Series, Language, Edition, Publisher}, sepc );	else	-- all other CS1 templates	tcommon = safe_join( {Title, TitleNote, Conference, Periodical, Format, TitleType, Series, Language,	Volume, Others, Edition, Publisher, Agency}, sepc );	end	if #ID_list > 0 then	ID_list = safe_join( { sepc .. " ", table.concat( ID_list, sepc .. " " ), ID }, sepc );	else	ID_list = ID;	end	local idcommon;	if 'audio-visual' == config.CitationClass or 'episode' == config.CitationClass then	-- special case for cite AV media & cite episode position transcript	idcommon = safe_join( { ID_list, URL, Archived, Transcript, AccessDate, Via, Lay, Quote }, sepc );	else	idcommon = safe_join( { ID_list, URL, Archived, AccessDate, Via, Lay, Quote }, sepc );	end	local text;	local pgtext = Position .. Sheet .. Sheets .. Page .. Pages .. At;	if utilities.is_set (Date) then	if utilities.is_set (Authors) or utilities.is_set (Editors) then	-- date follows authors or editors when authors not set	Date = " (" .. Date .. ")" .. OrigDate .. sepc .. " ";	-- in parentheses	else	-- neither of authors and editors set	if (string.sub(tcommon, -1, -1) == sepc) then	-- if the last character of tcommon is sepc	Date = " " .. Date .. OrigDate;	-- Date does not begin with sepc	else	Date = sepc .. " " .. Date .. OrigDate;	-- Date begins with sepc	end	end	end	if utilities.is_set (Authors) then	if (not utilities.is_set (Date)) then	-- when date is set it's in parentheses; no Authors termination	Authors = terminate_name_list (Authors, sepc);	-- when no date, terminate with 0 or 1 sepc and a space	end	if utilities.is_set (Editors) then	local in_text = " ";	local post_text = "";	if utilities.is_set (Chapter) and 0 == #c then	in_text = in_text .. cfg.messages['in'] .. " "	if (sepc ~= '.') then	in_text = in_text:lower()	-- lowercase for cs2	end	end	if EditorCount <= 1 then	post_text = " (" .. cfg.messages['editor'] .. ")";	-- be consistent with no-author, no-date case	else	post_text = " (" .. cfg.messages['editors'] .. ")";	end	Editors = terminate_name_list (in_text .. Editors .. post_text, sepc);	-- terminate with 0 or 1 sepc and a space	end	if utilities.is_set (Contributors) then	-- book cite and we're citing the intro, preface, etc.	local by_text = sepc .. ' ' .. cfg.messages['by'] .. ' ';	if (sepc ~= '.') then by_text = by_text:lower() end	-- lowercase for cs2	Authors = by_text .. Authors;	-- author follows title so tweak it here	if utilities.is_set (Editors) and utilities.is_set (Date) then	-- when Editors make sure that Authors gets terminated	Authors = terminate_name_list (Authors, sepc);	-- terminate with 0 or 1 sepc and a space	end	if (not utilities.is_set (Date)) then	-- when date is set it's in parentheses; no Contributors termination	Contributors = terminate_name_list (Contributors, sepc);	-- terminate with 0 or 1 sepc and a space	end	text = safe_join( {Contributors, Date, Chapter, tcommon, Authors, Place, Editors, tcommon2, pgtext, idcommon }, sepc );	else	text = safe_join( {Authors, Date, Chapter, Place, Editors, tcommon, pgtext, idcommon }, sepc );	end	elseif utilities.is_set (Editors) then	if utilities.is_set (Date) then	if EditorCount <= 1 then	Editors = Editors .. ", " .. cfg.messages['editor'];	else	Editors = Editors .. ", " .. cfg.messages['editors'];	end	else	if EditorCount <= 1 then	Editors = Editors .. " (" .. cfg.messages['editor'] .. ")" .. sepc .. " "	else	Editors = Editors .. " (" .. cfg.messages['editors'] .. ")" .. sepc .. " "	end	end	text = safe_join( {Editors, Date, Chapter, Place, tcommon, pgtext, idcommon}, sepc );	else	if utilities.in_array (config.CitationClass, {"journal", "citation"}) and utilities.is_set (Periodical) then	text = safe_join( {Chapter, Place, tcommon, pgtext, Date, idcommon}, sepc );	else	text = safe_join( {Chapter, Place, tcommon, Date, pgtext, idcommon}, sepc );	end	end	if utilities.is_set (PostScript) and PostScript ~= sepc then	text = safe_join( {text, sepc}, sepc );	--Deals with italics, spaces, etc.	text = text:sub(1, -sepc:len() - 1);	end	text = safe_join( {text, PostScript}, sepc );	-- Now enclose the whole thing in a <cite/> element	local options = {};	if utilities.is_set (config.CitationClass) and config.CitationClass ~= "citation" then	options.class = string.format ('%s %s %s', 'citation', config.CitationClass, utilities.is_set (Mode) and Mode or 'cs1');	-- class=citation required for blue highlight when used with |ref=	else	options.class = string.format ('%s %s', 'citation', utilities.is_set (Mode) and Mode or 'cs2');	end	if utilities.is_set (Ref) and 'none' ~= cfg.keywords_xlate[Ref:lower()] then	local id = Ref	if ('harv' == Ref ) then	local namelist = {};	-- holds selected contributor, author, editor name list	local year = first_set ({Year, anchor_year}, 2);	-- Year first for legacy citations and for YMD dates that require disambiguation	if #c > 0 then	-- if there is a contributor list	namelist = c;	-- select it	elseif #a > 0 then	-- or an author list	namelist = a;	elseif #e > 0 then	-- or an editor list	namelist = e;	end	if #namelist > 0 then	-- if there are names in namelist	id = anchor_id (namelist, year);	-- go make the CITEREF anchor	else	id = '';	-- unset	end	end	options.id = id;	end	if string.len(text:gsub("<span[^>/]*>(.-)</span>", "%1"):gsub("%b<>", "")) <= 2 then	-- remove <span> tags and other HTML-like markup; then get length of what remains	z.error_categories = {};	text = utilities.set_message ('err_empty_citation');	z.message_tail = {};	end	local render = {};	-- here we collect the final bits for concatenation into the rendered citation	if utilities.is_set (options.id) then	-- here we wrap the rendered citation in <cite ...>...</cite> tags	table.insert (render, utilities.substitute (cfg.presentation['cite-id'], {mw.uri.anchorEncode(options.id), mw.text.nowiki(options.class), text}));	-- when |ref= is set	else	table.insert (render, utilities.substitute (cfg.presentation['cite'], {mw.text.nowiki(options.class), text}));	-- all other cases	end	table.insert (render, utilities.substitute (cfg.presentation['ocins'], {OCinSoutput}));	-- append metadata to the citation	if 0 ~= #z.message_tail then	table.insert (render, ' ');	for i,v in ipairs( z.message_tail ) do	if utilities.is_set (v[1]) then	if i == #z.message_tail then	table.insert (render, utilities.error_comment ( v[1], v[2] ));	else	table.insert (render, utilities.error_comment ( v[1] .. "; ", v[2] ));	end	end	end	end	if 0 ~= #z.maintenance_cats then	local maint_msgs = {};	-- here we collect all of the maint messages	for _, v in ipairs( z.maintenance_cats ) do	-- append maintenance categories	local maint = {};	-- here we assemble a maintenence message	table.insert (maint, v);	-- maint msg is the category name	table.insert (maint, ' (');	-- open the link text	table.insert (maint, utilities.make_wikilink (':Category:' .. v, 'link'));	-- add the link	table.insert (maint, ')');	-- and close it	table.insert (maint_msgs, table.concat (maint));	-- assemble new maint message and add it to the maint_msgs table	end	table.insert (render, utilities.substitute (cfg.presentation['hidden-maint'], table.concat (maint_msgs, ' ')));	-- wrap the group of maint message with proper presentation and save	end	if not no_tracking_cats then	for _, v in ipairs( z.error_categories ) do	table.insert (render, utilities.make_wikilink ('Category:' .. v));	end	for _, v in ipairs( z.maintenance_cats ) do	-- append maintenance categories	table.insert (render, utilities.make_wikilink ('Category:' .. v));	end	for _, v in ipairs( z.properties_cats ) do	-- append properties categories	table.insert (render, utilities.make_wikilink ('Category:' .. v));	end	elseif 'nocat' == A:ORIGIN('NoTracking') then	-- peculiar special case; can't track nocat without tracking nocat	table.insert (render, utilities.make_wikilink ('Category:CS1 maint: nocat'));	-- hand-set this category because it is supposed to be temporary	end	return table.concat (render); end --[[--------------------------< V A L I D A T E >-------------------------------------------------------------- Looks for a parameter's name in one of several whitelists. Parameters in the whitelist can have three values:	true - active, supported parameters	false - deprecated, supported parameters	nil - unsupported parameters ]] local function validate (name, cite_class, empty)	local name = tostring (name);	local enum_name;	-- for enumerated parameters, is name with enumerator replaced with '#'	local state;	local function state_test (state, name)	-- local function to do testing of state values	if true == state then return true; end	-- valid actively supported parameter	if false == state then	if empty then return nil; end	-- deprecated empty parameters are treated as unknowns	deprecated_parameter (name);	-- parameter is deprecated but still supported	return true;	end	return nil;	end	if name:find ('#') then	-- # is a cs1|2 reserved character so parameters with # not permitted	return nil;	end	if utilities.in_array (cite_class, whitelist.preprint_template_list ) then	-- limited parameter sets allowed for these templates	state = whitelist.limited_basic_arguments[name];	if true == state_test (state, name) then return true; end	state = whitelist.preprint_arguments[cite_class][name];	-- look in the parameter-list for the template identified by cite_class	if true == state_test (state, name) then return true; end	-- limited enumerated parameters list	enum_name = name:gsub("%d+", "#" );	-- replace digit(s) with # (last25 becomes last#) (mw.ustring because non-Western 'local' digits)	state = whitelist.limited_numbered_arguments[enum_name];	if true == state_test (state, name) then return true; end	return false;	-- not supported because not found or name is set to nil	end	-- end limited parameter-set templates	if utilities.in_array (cite_class, whitelist.unique_param_template_list) then	-- experiment for template-specific parameters for templates that accept parameters from the basic argument list	state = whitelist.unique_arguments[cite_class][name];	-- look in the template-specific parameter-lists for the template identified by cite_class	if true == state_test (state, name) then return true; end	end	-- if here, fall into general validation	state = whitelist.basic_arguments[name];	-- all other templates; all normal parameters allowed	if true == state_test (state, name) then return true; end	-- all enumerated parameters allowed	enum_name = name:gsub("%d+", "#" );	-- replace digit(s) with # (last25 becomes last#) (mw.ustring because non-Western 'local' digits)	state = whitelist.numbered_arguments[enum_name];	if true == state_test (state, name) then return true; end	return false;	-- not supported because not found or name is set to nil end --[=[-------------------------< I N T E R _ W I K I _ C H E C K >---------------------------------------------- check <value> for inter-language interwiki-link markup. <prefix> must be a MediaWiki-recognized language code. when these values have the form (without leading colon):	[[<prefix>:link|label]] return label as plain-text	[[<prefix>:link]] return <prefix>:link as plain-text return value as is else ]=] local function inter_wiki_check (parameter, value)	local prefix = value:match ('%[%[(%a+):');	-- get an interwiki prefix if one exists	local _;	if prefix and cfg.inter_wiki_map[prefix:lower()] then	-- if prefix is in the map, needs preceding colon so	table.insert( z.message_tail, {utilities.set_message ('err_bad_paramlink', parameter)});	-- emit an error message	_, value, _ = utilities.is_wikilink (value);	-- extract label portion from wikilink	end	return value; end --[[--------------------------< M I S S I N G _ P I P E _ C H E C K >------------------------------------------ Look at the contents of a parameter. If the content has a string of characters and digits followed by an equal sign, compare the alphanumeric string to the list of cs1|2 parameters. If found, then the string is possibly a parameter that is missing its pipe. There are two tests made:	{{cite ... |title=Title access-date=2016-03-17}}	-- the first parameter has a value and whitespace separates that value from the missing pipe parameter name	{{cite ... |title=access-date=2016-03-17}}	-- the first parameter has no value (whitespace after the first = is trimmed by MediaWiki) cs1|2 shares some parameter names with XML/HTML attributes: class=, title=, etc. To prevent false positives XML/HTML tags are removed before the search. If a missing pipe is detected, this function adds the missing pipe maintenance category. ]] local function missing_pipe_check (parameter, value)	local capture;	value = value:gsub ('%b<>', '');	-- remove XML/HTML tags because attributes: class=, title=, etc.	capture = value:match ('%s+(%a[%w%-]+)%s*=') or value:match ('^(%a[%w%-]+)%s*=');	-- find and categorize parameters with possible missing pipes	if capture and validate (capture) then	-- if the capture is a valid parameter name	table.insert( z.message_tail, {utilities.set_message ('err_missing_pipe', parameter)});	end end --[[--------------------------< H A S _ E X T R A N E O U S _ P U N C T >-------------------------------------- look for extraneous terminal punctuation in most parameter values; parameters listed in skip table are not checked ]] local function has_extraneous_punc (param, value)	if 'number' == type (param) then	return;	end	param = param:gsub ('%d+', '#');	-- enumerated name-list mask params allow terminal punct; normalize	if cfg.punct_skip[param] then	return;	-- parameter name found in the skip table so done	end	if value:match ('[,;:]$') then	utilities.set_message ('maint_extra_punct');	-- has extraneous punctuation; add maint cat	end end --[[--------------------------< C I T A T I O N >-------------------------------------------------------------- This is used by templates such as {{cite book}} to create the actual citation text. ]] local function citation(frame)	Frame = frame;	-- save a copy in case we need to display an error message in preview mode	local pframe = frame:getParent()	local styles;	if nil ~= string.find (frame:getTitle(), 'sandbox', 1, true) then	-- did the {{#invoke:}} use sandbox version?	cfg = mw.loadData ('Module:Citation/CS1/Configuration/sandbox');	-- load sandbox versions of support modules	whitelist = mw.loadData ('Module:Citation/CS1/Whitelist/sandbox');	utilities = require ('Module:Citation/CS1/Utilities/sandbox');	validation = require ('Module:Citation/CS1/Date_validation/sandbox');	identifiers = require ('Module:Citation/CS1/Identifiers/sandbox');	metadata = require ('Module:Citation/CS1/COinS/sandbox');	styles = 'Module:Citation/CS1/sandbox/styles.css';	else	-- otherwise	cfg = mw.loadData ('Module:Citation/CS1/Configuration');	-- load live versions of support modules	whitelist = mw.loadData ('Module:Citation/CS1/Whitelist');	utilities = require ('Module:Citation/CS1/Utilities');	validation = require ('Module:Citation/CS1/Date_validation');	identifiers = require ('Module:Citation/CS1/Identifiers');	metadata = require ('Module:Citation/CS1/COinS');	styles = 'Module:Citation/CS1/styles.css';	end	utilities.set_selected_modules (cfg);	-- so that functions in Utilities can see the selected cfg tables	identifiers.set_selected_modules (cfg, utilities);	-- so that functions in Identifiers can see the selected cfg tables and selected Utilities module	validation.set_selected_modules (cfg, utilities);	-- so that functions in Date validataion can see selected cfg tables and the selected Utilities module	metadata.set_selected_modules (cfg, utilities);	-- so that functions in COinS can see the selected cfg tables and selected Utilities module	z = utilities.z;	-- table of error and category tables in Module:Citation/CS1/Utilities	local args = {};	-- table where we store all of the template's arguments	local suggestions = {};	-- table where we store suggestions if we need to loadData them	local error_text, error_state;	local config = {};	-- table to store parameters from the module {{#invoke:}}	for k, v in pairs( frame.args ) do	-- get parameters from the {{#invoke}} frame	config[k] = v;	--	args[k] = v;	-- crude debug support that allows us to render a citation from module {{#invoke:}}; skips parameter validation; TODO: keep?	end	local capture;	-- the single supported capture when matching unknown parameters using patterns	local empty_unknowns = {};	-- sequence table to hold empty unknown params for error message listing	for k, v in pairs( pframe.args ) do	-- get parameters from the parent (template) frame	v = mw.ustring.gsub (v, '^%s*(.-)%s*$', '%1');	-- trim leading/trailing whitespace; when v is only whitespace, becomes empty string	if v ~= '' then	if ('string' == type (k)) then	k = mw.ustring.gsub (k, '%d', cfg.date_names.local_digits);	-- for enumerated parameters, translate 'local' digits to Western 0-9	end	if not validate( k, config.CitationClass ) then	error_text = "";	if type( k ) ~= 'string' then	-- exclude empty numbered parameters	if v:match("%S+") ~= nil then	error_text, error_state = utilities.set_message ( 'err_text_ignored', {v}, true );	end	elseif validate( k:lower(), config.CitationClass ) then	error_text, error_state = utilities.set_message ( 'err_parameter_ignored_suggest', {k, k:lower()}, true );	-- suggest the lowercase version of the parameter	else	if nil == suggestions.suggestions then	-- if this table is nil then we need to load it	if nil ~= string.find (frame:getTitle(), 'sandbox', 1, true) then	-- did the {{#invoke:}} use sandbox version?	suggestions = mw.loadData( 'Module:Citation/CS1/Suggestions/sandbox' );	-- use the sandbox version	else	suggestions = mw.loadData( 'Module:Citation/CS1/Suggestions' );	-- use the live version	end	end	for pattern, param in pairs (suggestions.patterns) do	-- loop through the patterns to see if we can suggest a proper parameter	capture = k:match (pattern);	-- the whole match if no capture in pattern else the capture if a match	if capture then	-- if the pattern matches	param = utilities.substitute (param, capture);	-- add the capture to the suggested parameter (typically the enumerator)	if validate (param, config.CitationClass) then	-- validate the suggestion to make sure that the suggestion is supported by this template (necessary for limited parameter lists)	error_text, error_state = utilities.set_message ('err_parameter_ignored_suggest', {k, param}, true);	-- set the suggestion error message	else	error_text, error_state = utilities.set_message ( 'err_parameter_ignored', {param}, true );	-- suggested param not supported by this template	v = '';	-- unset	end	end	end	if not utilities.is_set (error_text) then	-- couldn't match with a pattern, is there an expicit suggestion?	if suggestions.suggestions[ k:lower() ] ~= nil then	error_text, error_state = utilities.set_message ( 'err_parameter_ignored_suggest', {k, suggestions.suggestions[ k:lower() ]}, true );	else	error_text, error_state = utilities.set_message ( 'err_parameter_ignored', {k}, true );	v = '';	-- unset value assigned to unrecognized parameters (this for the limited parameter lists)	end	end	end	if error_text ~= '' then	table.insert( z.message_tail, {error_text, error_state} );	end	end	args[k] = v;	-- save this parameter and its value	elseif not utilities.is_set (v) then	-- for empty parameters	if not validate (k, config.CitationClass, true) then	-- is this empty parameter a valid parameter	k = ('' == k) and '(empty string)' or k;	-- when k is empty string (or was space(s) trimmed to empty string), replace with descriptive text	table.insert (empty_unknowns, utilities.wrap_style ('parameter', k));	-- format for error message and add to the list	end	-- crude debug support that allows us to render a citation from module {{#invoke:}} TODO: keep?	--	elseif args[k] ~= nil or (k == 'postscript') then	-- when args[k] has a value from {{#invoke}} frame (we don't normally do that)	--	args[k] = v;	-- overwrite args[k] with empty string from pframe.args[k] (template frame); v is empty string here	end	-- not sure about the postscript bit; that gets handled in parameter validation; historical artifact?	end	if 0 ~= #empty_unknowns then	-- create empty unknown error message	table.insert (z.message_tail, {utilities.set_message ('err_param_unknown_empty', {	1 == #empty_unknowns and '' or 's',	utilities.make_sep_list (#empty_unknowns, empty_unknowns)	}, true )});	end	for k, v in pairs( args ) do	if 'string' == type (k) then	-- don't evaluate positional parameters	has_invisible_chars (k, v);	-- look for invisible characters	end	has_extraneous_punc (k, v);	-- look for extraneous terminal punctuation in parameter values	missing_pipe_check (k, v);	-- do we think that there is a parameter that is missing a pipe?	args[k] = inter_wiki_check (k, v);	-- when language interwiki-linked parameter missing leading colon replace with wiki-link label	end	return table.concat ({citation0( config, args), frame:extensionTag ('templatestyles', '', {src=styles})}); end --[[--------------------------< E X P O R T E D F U N C T I O N S >------------------------------------------ ]] return {citation = citation};