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John Cowan <jcowan@r...> writes:

> Bullard, Claude L (Len) scripsit:
> 
> > The problem of the Universal Identifier concept is that 
> > it assumes the web is the universe and vice versa.  It 
> > builds unreliability into the system.  Definitions that 
> > include the term 'universal information space' are silly.
> 
> IMHO it would have been better to decree that in XML the public id,
> rather than the system id, must be a URI.

FPIs have much richer structure than typical URIs, certainly URLs:
language, encoding and file type (DTD, ENT, DOC, etc.). All these are
available in MIME headers, XML declarations, xml:lang headers... When
you GET the entity over HTTP and the author used xml:lang.

Ari.

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