DECOMO had right idea, note use of context correllation and cross-context concepts.
Also a long time ago RP said we'd see micrOS shine with security as www proliferated via XML, well note the semantics gathered via meta thu use of XML.
Remember I showed metadata relates to facebook primarily thru profiles.

http://ceur-ws.org/Vol-520/paper11.pdf

Read very end, ''A day with IYOUIT'' shows how CA may work -

ftp://ftp.cordis.europa.eu/pub/fp7/ict/docs/content-knowledge/08-infoday-matthias-wagner-iyouit-docomo-personal-sphere-parallel-session-11may09_en.pdf

emit...