I did some research on this a couple of years ago - the aim was to come up with a mechanism that extended HTTP so any existing caching infrastructure could pick

I did some research on this a couple of years ago - the aim was to come up with a mechanism that extended HTTP so any existing caching infrastructure could pick it up and implement it. I wrote up a summary of the research here: http://restafari.blogspot.com/2010/04/link-header-based-invalidation-of.html http://restafari.blogspot.com/2010/04/link-header-based-inva... Since then Mark Nottingham and myself have written this up as an internet draft: http://tools.ietf.org/html/draft-nottingham-linked-cache-inv-01 http://tools.ietf.org/html/draft-nottingham-linked-cache-inv...