Subscription list interchange may be prior art
Saturday, November 24, 2007 by Dave Winer.
I have to write a piece about how OPML came to be the defacto standard for interchange of subscription lists. I hadn't thought about it this way until just now but it's actually the model for what I want Netflix and Yahoo to do with movie rating data, and now it's just been suggested that the model be used for interchange of social network data. I know the gurus of this probably won't like it, but it actually a good use case. This could be the beginning of an interesting comment thread.