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Annotea Bookmark RDF Schema. Looks promising. It's derived in part from XBEL, the Python crew's bookmarking XML. It includes topic classification, not sure how compatible it'll be with other systems. Can facetting be overlaid? Can it be transformed to/from XML Topic Maps? Bridge to Topic Exchange?

The answer to all of these is probably yes, and as it's a nice simple vocabulary I'll probably use it in IdeaGraph.

What I don't like about their implementation is that it uses local filesystem references, something I've been trying to avoid doing directly as it doesn't seem very portable/web-friendly. They have e.g.

<rdf:Description rdf:about="file:///home/.amaya/bookmarks.rdf#FamousPeople">

I've been using something more like :

rdf:about="http://ideagraph.net/myusername/amaya/bookmarks.rdf#FamousPeople"

where that permanent URI isn't pointing to anything retrievable, but is mapped through another set of statements (local RDF file) something like:

&ltrdf:Description rdf:about=http://ideagraph.net/myusername'

rdfs:label='Me'

fs:local='file:///home/.amaya/test/test.rdf'>

</rdf:Description>



this way the descriptive stuff can stay the same when the data is passed from one host to another, only the namespace/filesystem mapping (which is fairly global) needs to change, and that can happen at an application level. There's a word for that…

[Danny Ayers]