Re: ldp-ISSUE-49 (Canonical-URI): Canonical URL - how to communicate its value to clients

>  if you access the same resource via various URIs, these
> are not the same resources (per definitionem). 

I'd agree that's the only safe assumption for a client in the absence of 
more information (from the server), but I think you're overstating the 
case.  3986 has an entire section on URI equivalence [1] that renders 
quite explicit the distinction between URIs (identifiers) and the 
resource(s) they identify.  Since the server that "owns" (provides access 
to) a resource *does* "have full knowledge or control" over it, it is in 
fact the only actor actually capable of authoritatively saying whether or 
not different URIs refer to the same resource.

[1] http://tools.ietf.org/html/rfc3986#section-6.1

Best Regards, John

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