Joseph Reagle published his Busy Sponge Requirements a personal draft to define "an easy syntax for capturing ideas" with references to N3, WikiWikiWebs and the chump.
Disclaimer: the chump is driving this newswire.
John Cowan, of the W3C Infoset group (but acting unofficially), proposed an Infoset serialization designed to handle a variety of Infoset augmentations