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RE: [issue-dbooth-3] Identity transformation

From: Booth, David (HP Software - Boston) <dbooth@hp.com>
Date: Tue, 12 Jun 2007 19:58:07 -0400
Message-ID: <EBBD956B8A9002479B0C9CE9FE14A6C202C4D1CE@tayexc19.americas.cpqcorp.net>
To: "Dan Connolly" <connolly@w3.org>
Cc: <public-grddl-wg@w3.org>, "Jeremy Carroll" <jjc@hpl.hp.com>, "McBride, Brian" <brian.mcbride@hp.com>

> From: Dan Connolly [mailto:connolly@w3.org] 
> 
> On Tue, 2007-06-12 at 14:56 -0400, Booth, David (HP Software - Boston)
> wrote:
> [...]
> > IDENTITY TRANSFORMATION PROBLEM
> > As a GRDDL transformation author, I wish to write an unambiguous
> > identity transformation, such that for any given representation R,
> > served from URI U, the GRDDL result of the transformation 
> > is a single RDF assertion of the form:
> > 
> > 	U myns:says R.
> > 
> > At present, the GRDDL spec does not permit me to write such a
> > transformation to produce correct results
> 
> True. GRDDL doesn't solve all problems. It's fine by me
> that it doesn't solve this problem.

But this is not only a problem for the entire document.  The same
problem also exists for *portions* of the XML document -- even small
portions.  The problem applies to *any* portion whose corresponding
XPath Node tree could vary depending on the parser.

Thus I cannot reliably write correct, unambiguous GRDDL transformations
that wish to do coarse-grained transformations of XML to RDF, as
described here:
http://dbooth.org/2007/rdf-and-soa/rdf-and-soa-paper.htm#granularity

That sure seems like a problem to me.


David Booth, Ph.D.
HP Software
+1 617 629 8881 office  |  dbooth@hp.com
http://www.hp.com/go/software

Opinions expressed herein are those of the author and do not represent
the official views of HP unless explicitly stated otherwise.
 
Received on Tuesday, 12 June 2007 23:59:05 UTC

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