I know the Atom working group seemed to be against reusing dublin core in the core Atom spec, but since this is an extension, were dcterms:valid and/or dcterms:available ever considered as alternatives? From my understanding they appear to be describing essentially the same thing.
I don't particularly like the whole DCMI Period structure they're using, but since it's an existing format, any aggregator author that wishes to support this sort of thing is probably going to be supporting it anyway. Adding another extension that does essentially the same thing just gives them more work to do.
Or have I complete misunderstood the intended use? James M Snell wrote:
Summary: introduces a mechanism for specifying a date-time or maximum age for the informational content of a feed or entry
