W3C home > Mailing lists > Public > public-rdf-in-xhtml-tf@w3.org > April 2008

Re: Updated distiller plus some new tests

From: Ivan Herman <ivan@w3.org>
Date: Fri, 04 Apr 2008 08:45:45 +0200
Message-ID: <47F5CE99.1040700@w3.org>
To: Ben Adida <ben@adida.net>
CC: Elias Torres <elias@torrez.us>, "Hausenblas, Michael" <michael.hausenblas@joanneum.at>, W3C RDFa task force <public-rdf-in-xhtml-tf@w3.org>, Manu Sporny <msporny@digitalbazaar.com>

Ben Adida wrote:
> Elias Torres wrote:
>> My implementation uses double-quotes instead of single-quotes for the 
>> xmlns attribute. I can escape fine, but my SPARQL query will fail 
>> because the string doesn't match character-per-character.
> After much discussion on past telecons and on the mailing list regarding 
> this issue, we've concluded that this is a (widespread) problem with 
> triple stores and SPARQL engines, not with RDFa. Specifically, triple 
> stores and SPARQL engines are supposed to canonicalize all XMLLiterals 
> and match them appropriately, according to RDF Concepts.

Exactly. I actually reported this bug on sparqler a while ago (when the 
whole discussion on XMLLiteral happened), and it was accepted as a bug.

What this means in practice, unfortunately, that our automatic procedure 
for testing (a.k.a. crazy ivan) will fail for XML Literals, and the 
result will have to be checked by hand, so to say. I guess we will 
survive that:-)


> That said, to make things as productive as possible, we should use the 
> most likely XMLLiteral serialization... I suspect that's double-quotes, 
> unless someone else thinks otherwise?
> -Ben


Ivan Herman, W3C Semantic Web Activity Lead
Home: http://www.w3.org/People/Ivan/
PGP Key: http://www.ivan-herman.net/pgpkey.html
FOAF: http://www.ivan-herman.net/foaf.rdf

Received on Friday, 4 April 2008 06:46:27 UTC

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