% gem install schematron 

% stron my_schema.stron my_xml_document.xml 

# overhead require "libxml" require "schematron" include LibXML # load the schematron xml stron_doc = XML::Document.file "/path/to/my_schema.stron" # make a schematron object stron = Schematron::Schema.new stron_doc # load the xml document you wish to validate xml_doc = XML::Document.file "/path/to/my_xml_document.xml" # validate it results = stron.validate xml_doc # print out the results stron.validate(instance_doc).each do |error| puts "#{error[:line]}: #{error[:message]}" end