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Where can I download the schema (or DTD) for the layout of the WordPress import/export file format?

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As far as I know no one ever [publicly] documented it and all questions about that are met with "it's like RSS, want documentation - do it yourself".

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  • @Rarst- Thanks,but that's odd, I'll do an export this weekend and take a look. I just thought it would be smarter to start with the schema... and all good developers seem to create a schema for the XML. Commented Jan 21, 2011 at 17:41
  • @NealWalters yeeeah... having excellent documentation is not exactly what WordPress is known for. :\ Things that are completely undocumented thankfully aren't abundant, but aren't unique occurrence either. Commented Jan 21, 2011 at 17:47
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It seems to be an RSS Feed http://en.wikipedia.org/wiki/RSS extended with some of WordPress's own extensions. Unfortunately, it applies only to posts and pages. I was thinking about using it to migrate data from PHP-Fusion to WordPress, but it would only be a partial solution.

I tried some of the naemspaces below in the browser to see if they would give me a schema or DTD, but they did not.

Here's an example: 

<rss version="2.0" xmlns:excerpt="http://wordpress.org/export/1.0/excerpt/" - xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:wp="http://wordpress.org/export/1.0/" > <channel> <title>MrHebrew.com</title> <link>http://mrhebrew.com</link> <description>My Site Descr</description> <pubDate>Wed, 05 Jan 2011 05:54:07 +0000</pubDate> <generator>http://wordpress.org/?v=3.0.3</generator> <language>en</language> <wp:wxr_version>1.0</wp:wxr_version> <wp:base_site_url>http://mrhebrew.com</wp:base_site_url> <wp:base_blog_url>http://mrhebrew.com</wp:base_blog_url> <wp:category><wp:category_nicename>adam-and-eve</wp:category_nicename><wp:category_parent></wp:category_parent><wp:cat_name><![CDATA[Adam and Eve]]></wp:cat_name></wp:category> <wp:category><wp:category_nicename>book-of-joshua</wp:category_nicename><wp:category_parent></wp:category_parent><wp:cat_name><![CDATA[Book of Joshua]]></wp:cat_name></wp:category> <wp:tag><wp:tag_slug>jeremiah</wp:tag_slug><wp:tag_name><![CDATA[Jeremiah]]></wp:tag_name></wp:tag> <wp:tag><wp:tag_slug>joshua</wp:tag_slug><wp:tag_name><![CDATA[Joshua]]></wp:tag_name></wp:tag> <wp:tag><wp:tag_slug>judges</wp:tag_slug><wp:tag_name><![CDATA[Judges]]></wp:tag_name></wp:tag> <wp:tag><wp:tag_slug>king-saul</wp:tag_slug><wp:tag_name><![CDATA[King Saul]]></wp:tag_name></wp:tag> <item> <title>Another Possible Punctuation Changes Meaning Entirely</title> <link>http://mrhebrew.com/?p=136</link> <pubDate>Wed, 05 Jan 2011 05:52:49 +0000</pubDate> <dc:creator><![CDATA[Administrator]]></dc:creator> <category><![CDATA[Isaiah]]></category> <category domain="category" nicename="isaiah"><![CDATA[Isaiah]]></category> <category><![CDATA[Punctuation]]></category> <category domain="category" nicename="punctuation"><![CDATA[Punctuation]]></category> <category domain="tag"><![CDATA[punctuation]]></category> <category domain="tag" nicename="punctuation-2"><![CDATA[punctuation]]></category> <category domain="tag"><![CDATA[question-mark]]></category> <category domain="tag" nicename="question-mark"><![CDATA[question-mark]]></category> <guid isPermaLink="false">http://mrhebrew.com/?p=136</guid> <description></description> <content:encoded><![CDATA[ text of blog here ]]></content:encoded> <excerpt:encoded><![CDATA[]]></excerpt:encoded> <wp:post_id>136</wp:post_id> <wp:post_date>2011-01-05 05:52:49</wp:post_date> <wp:post_date_gmt>2011-01-05 05:52:49</wp:post_date_gmt> <wp:comment_status>open</wp:comment_status> <wp:ping_status>open</wp:ping_status> <wp:post_name>another-possible-punctuation-changes-meaning-entirely</wp:post_name> <wp:status>publish</wp:status> <wp:post_parent>0</wp:post_parent> <wp:menu_order>0</wp:menu_order> <wp:post_type>post</wp:post_type> <wp:post_password></wp:post_password> <wp:is_sticky>0</wp:is_sticky> <wp:postmeta> <wp:meta_key>_edit_lock</wp:meta_key> <wp:meta_value><![CDATA[1294206847]]></wp:meta_value> </wp:postmeta> <wp:postmeta> <wp:meta_key>_edit_last</wp:meta_key> <wp:meta_value><![CDATA[1]]></wp:meta_value> </wp:postmeta> <wp:postmeta> <wp:meta_key>_encloseme</wp:meta_key> <wp:meta_value><![CDATA[1]]></wp:meta_value> </wp:postmeta> <wp:postmeta> <wp:meta_key>_wp_old_slug</wp:meta_key> <wp:meta_value><![CDATA[]]></wp:meta_value> </wp:postmeta> <wp:postmeta> <wp:meta_key>_pingme</wp:meta_key> <wp:meta_value><![CDATA[1]]></wp:meta_value> </wp:postmeta> <wp:postmeta> <wp:meta_key>_wp_old_slug</wp:meta_key> <wp:meta_value><![CDATA[another-possible-punctuation-changs-meaning-entirely]]></wp:meta_value> </wp:postmeta> <wp:comment> <wp:comment_id>267</wp:comment_id> <wp:comment_author><![CDATA[sex tubes]]></wp:comment_author> <wp:comment_author_email>[email protected]</wp:comment_author_email> <wp:comment_author_url>http://41tube.com</wp:comment_author_url> <wp:comment_author_IP>89.149.244.89</wp:comment_author_IP> <wp:comment_date>2011-01-08 20:26:32</wp:comment_date> <wp:comment_date_gmt>2011-01-08 20:26:32</wp:comment_date_gmt> <wp:comment_content><![CDATA[I can see the logic in your argument but I think you've painted your strokes]]></wp:comment_content> <wp:comment_approved>spam</wp:comment_approved> <wp:comment_type></wp:comment_type> <wp:comment_parent>0</wp:comment_parent> <wp:comment_user_id>0</wp:comment_user_id> </wp:comment> </item> </channel> </rss>
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Here you can find an example with most important tags of a DTD used for example by InDesign for testing purposes. By reading the WordPress XML exported (WP v3.2.1), it is easy to choose and add the right tags in the right place.

<?xml version="1.0" encoding="UTF-8" ?> <!ELEMENT rss ( channel ) > <!ELEMENT channel ( item+ ) > <!ELEMENT item ( title, link, pubDate, dc:creator, content:encoded ) > <!ELEMENT title ( #PCDATA ) > <!ELEMENT link ( #PCDATA ) > <!ELEMENT pubDate ( #PCDATA ) > <!ELEMENT dc:creator (#PCDATA ) > <!ELEMENT content:encoded ( #PCDATA ) >

A reference link for DTD

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