The expired-but-not-dead-yet W3C HTML working group has published a proposed recommendation of XHTML™ Modularization 1.1. No, you didn't miss a step. They went straight from no-spec at all to proposed recommendation with no working drafts, no last call, no candidate recommendattions, no nothing. This is in pretty clear violation of every rule the W3C claims to operate by. The claim is that this is just an update of Modularization of XHTML™ and Modularization of XHTML™ in XML Schema. However this document actually introduces several completely new ideas that have never previously seen the light of day anywhere. Most notably, XHTML attributes can now be exposed to other vocabularies by placing them in the XHTML namespace. For example,
<Foo xmlns:xhtml="http://www.w3.org/1999/xhtml" xhtml:id="f1" xhtml:onkeypress="some Javascript" xhtml:class="notHTML" />
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