rev. 33

Changelog (15 October 2017):

• <deftext> introduced in order to fix multiple errors in DTD scheme
• <rref> tag: added lctn and type attributes, links are not stored inside the tag anymore
• <kref> tag: idref attribute introduced
• <c> tag: added necessary hash sign # in attribute
• <categ> tag now is a list of <kref> tags
• <etm> may now have <mrkd> inside to mark etymological ancestors/cognates
• <dtrn> may now contain <kref> tag(s) inside
• <u> tag for underlined text introduced
• <br/> tag introduced for newlines inside articles
• <ex> now might have <iref> tag inside
• <ex>, <tr>, <co> tags now may have user-set attribute values