[fix #777] Allow xml:lang="" by replacing datatype.languagecode by datatype.languagecode | string "".#778

Merged

tofi86 merged 2 commits intow3c:masterfrom Advanced-Publishing-Laboratory:fix-777_empty_xml_lang

Jul 10, 2017

+23-5

Commits on Jul 7, 2017

Allow xml:lnag="" by replacing datatype.languagecode by datatype.languagecode | string "".
murata2makoto
committed

Commits on Jul 10, 2017

Add test for schema changes for empty lang attribute
tofi86
committed