IRI presentation resources

Hello,

I am going to make a presentation concerning IRIs in Jena, and the Jena 
IRI library, at the Jena User Conference:

http://hpl.hp.com/conferences/juc2007/agenda.html

For this, ideally I would like about 15 or 20 mins worth of stuff on 
IRIs and IDNAs etc in general, that I can copy (with attribution).

Are there some appropriate presentations and/or material on the Web?
(or that could be e-mailed me)

thanks

Jeremy


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