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Subject: RE: [xdi] on global cross references and the link contract use case

Hello Les,

First, thank you for having read the contribution! Unfortunately I'm probably not the best person which can answer your question, as I'm not an expert of XRI2.0. I limited to develop my contribution in the scope of the current proposal ( http://wiki.oasis-open.org/xri/XriThree/GcsDelimiter), which, I personally support for one specific reason: http://lists.oasis-open.org/archives/xri/200811/msg00043.html.

I think Drummond's reply http://lists.oasis-open.org/archives/xdi/200811/msg00031.html is a good technical explanation of this, expecially the last statement: in an ordered set, you are not referencing across contexts. The context is the ordered set itself. For example, in $sig$d, the context for $d is $sig. Which I understand as follow: put an object inside a context is not exactly the same as referencing it from that context).

The core of this issue - that's my guess and not a technical explanation -  is probably that XRI2.0 did not consider the need to "put an instance of an object inside a context", but just to "cross reference" it. That is instead a fundamental capability for XDI (and for any human or machine understandable language).

I'll be happy to answer any further questions you might have on the contents of the contribution itself.

Kind Regards,

At 13.36 25/11/2008, Chasen, Les wrote:
Hi Giovanni.  I had a chance to read this.  While I like what you guys
are doing with link contracts I fail to understand why all of these
examples do not work with XRI 2.0 style cross references. 

> -----Original Message-----
> From: Giovanni Bartolomeo [ mailto:giovanni.bartolomeo@uniroma2.it]
> Sent: Wednesday, November 19, 2008 12:02 PM
> To: XDI
> Subject: [xdi] on global cross references and the link contract use
> case
> Hello,
> some weeks ago I mentioned that I was playing a bit with the
> semantics of link contracts. Better to say, with the global cross
> references applied to the link contract use case. After the issue of
> XDI RDF model v.11, I put my thoughts in a document which you can find
> below.
> Maybe just semantic nuances, but your comments will be welcome.
> Thanks,
> Giovanni

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