From RDFa Working Group Wiki
Subject: [Comment response] To Tom Baker
Thank you for your comment
on the RDFa 1.1 drafts.
The issues you raised are simply our mistake. Ie, there is no hidden agenda in not using http://purl.org/dc/terms/ in the document, simply our own sloppiness...
The internal draft for RDFa1.1 Core uses http://purl.org/dc/terms/ everywhere now, and this will be the case for the published version.
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