This is a vocabulary collection utilized by XHTML Family modules and document types using XHTML Modularization, including XHTML Role and XHTML + RDFa as defined in rdfa-syntax. @en
(2013-12-06) Bernard Vatant: The XHTML specifications are developed by the W3C XHTML 2 Working Group as part of the W3C HTML Activity. This vocabulary is described in RDFa in the HTML documentation.
