W3C home > Mailing lists > Public > www-rdf-logic@w3.org > November 2000

RE: names, URIs and ontologies

From: McBride, Brian <bwm@hplb.hpl.hp.com>
Date: Wed, 1 Nov 2000 11:00:28 -0000
Message-ID: <5E13A1874524D411A876006008CD059F239467@0-mail-1.hpl.hp.com>
To: pat hayes <phayes@ai.uwf.edu>
Cc: www-rdf-logic@w3.org
> local-only URIs, which can be used anywhere but are in effect
> existentially quantified within the page of use (and for which any
> associated operational process is relative to the page of use).

I don't think this is right.  There is no such thing as a local URI.
When names like "#Boston" are used in and XML serialization of RDF,
this is a syntactic shorthand for the fully qualified URI.  The
fully qualified URI is constructed by appending a base URI to fragment
identifier "#Boston".  The default base URI is the URI of containing
document, but may be overridden using xmlbase.

When an RDF parser meets a name like "#Boston", it converts it to
the fully qualified form, and that is what appears in the triples it
generates.

In an RDF document, say http://foo

<rdf:Property rdf:about="#bar">foobar</rdf:Property>

and

<rdf:Property rdf:about="http://foo#bar>foobar</rdf:Property>

are exactly equivalent.

There are no local only URI's.

Brian McBride
HPLabs

PS: Lynn - sorry got this twice
Received on Wednesday, 1 November 2000 06:00:37 UTC

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