W3C home > Mailing lists > Public > www-rdf-interest@w3.org > April 2001

RE: RDF in XHTML

From: Joshua Allen <joshuaa@microsoft.com>
Date: Thu, 19 Apr 2001 03:33:30 -0700
Message-ID: <4F4182C71C1FDD4BA0937A7EB7B8B4C1D1581E@red-msg-08.redmond.corp.microsoft.com>
To: "Murray Altheim" <altheim@eng.sun.com>, "Jonathan Borden" <jborden@mediaone.net>
Cc: "RDF Interest" <www-rdf-interest@w3.org>
> that one of the conclusions was that schema validation of RDF was
quite
> difficult. I'm sure somebody on this list will correct me, but I am
under
> the impression that an RDF schema validator is necessary to validate
RDF.
> I don't think XML Schema is up to that task.

The issue is probably that "validation" can mean different things.  For
simply validating that the RDF grammar is used correctly (xml
validation), there is a DTD fragment [1] although this seems to be
incomplete [2].  There is also an XSD schema [3], which claims to be
complete for all but the RDF abbreviated syntax.  Validating the RDF
schema itself is a different story altogether, and really shouldn't be
the job of DTD or XSD.  I notice that two RDF tools (VRP and GINF) claim
support for RDF Schema validation.  I couldn't characterize how
*difficult* this was to implement, but would just point out this is a
different thing than XML validation.

[1] http://www.ascc.net/xml/resource/rdf.dtd
[2]
http://www.lists.ic.ac.uk/hypermail/xml-dev/xml-dev-Mar-1999/0575.html
[3] http://www.w3.org/2000/07/rdf.xsd
Received on Thursday, 19 April 2001 09:10:40 GMT

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