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   RE: [xml-dev] many-to-many

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It seems to not include the concept that the 
authority over the resource makes the selection 
among the more-or-less equivalent representations. 
Exact equivalence is not a requirement and hence 
the sense of ambiguity.  

OTOH, if not equivalent, 
doesn't the idea of state representation begin 
to fall apart if time-varying properties are not 
in effect, say the case where the representation 
returned varies by format not to mention fragments 
which are selected not by ID but by some other 
selector value (e.g, set of all elements named foo or 
within span X to Y)?  In other words, equivalence 
is in the eye of the authority not the requestor.

Still, none of that fixes the RDF problem which 
as I understand it, and correct me if I am wrong, 
demands a one to one mapping.  


-----Original Message-----
From: Simon St.Laurent [mailto:simonstl@simonstl.com]

distobj@acm.org (Mark Baker) cites Roy Fielding:
> "More precisely, a resource R is a temporally varying membership
>  function MR(t), which for time t maps to a set of entities, or
>  values, which are equivalent."
>   -- http://lists.w3.org/Archives/Public/uri/2000Sep/0030

I think the "many-to-many" effectively denies (or makes deeply
contingent) the "are equivalent" at the end of that - at least that's my


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