I'm sure this is painfully obvious to everyone, but this is not a good-faith move by Mark to follow the spec (or at least the recommended way to do things).
dc:dateelements for all dates
- full text as well as excerpts
linkelements to point to articles
- no dates (not
pubDateelements, as the spec recommends)
- only excerpts
guidelements to point to articles
For more information, go through Mark's comments and read the ones by Rogers Cadenhead. (His server is down at the moment, so I can't quote them here).