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Re: Casting a literal to a typed literal?

From: Seaborne, Andy <andy.seaborne@hp.com>
Date: Tue, 15 Mar 2005 17:15:51 +0000
Message-ID: <42371847.3000903@hp.com>
To: "Thompson, Bryan B." <BRYAN.B.THOMPSON@saic.com>
Cc: "'public-rdf-dawg@w3.org'" <public-rdf-dawg@w3.org>

Bryan,

More comments - great!


Thompson, Bryan B. wrote:
> Hello,
> 
> With respect to the example in Section 11.1, can someone point me to
> the aspect of the grammar that handles casting to a typed literal?
> If these are meant as function calls, then the last line should use
> 
>    &xsd:dateTime(?date)
> 
> and not
> 
>     xsd:dateTime(?date)

The latter is the syntax currently.  There is no distinction between function 
calls and casting any more.

> 
> The full example is:
> 
> PREFIX a:      <http://www.w3.org/2000/10/annotation-ns#>
> PREFIX dc:     <http://purl.org/dc/elements/1.1/>
> PREFIX xsd:    <http://www.w3.org/2001/XMLSchema#>
> 
> SELECT ?annot
> WHERE ( ?annot  a:annotates  <http://www.w3.org/TR/rdf-sparql-query/> )
>       ( ?annot  dc:created   ?date )
>   AND xsd:dateTime(?date) < xsd:dateTime("2005-01-01T00:00Z")

The example in 11.1 is currently:

PREFIX a:      <http://www.w3.org/2000/10/annotation-ns#>
PREFIX dc:     <http://purl.org/dc/elements/1.1/>
PREFIX xsd:    <http://www.w3.org/2001/XMLSchema#>

SELECT ?annot
WHERE { ?annot  a:annotates  <http://www.w3.org/TR/rdf-sparql-query/> .
         ?annot  dc:created   ?date .
         FILTER xsd:dateTime(?date) < xsd:dateTime("2005-01-01T00:00Z") }

(Eric - isn't that constant dateTime in need of the seconds? I didn't think they 
were optional

   FILTER xsd:dateTime(?date) < "2005-01-01T00:00:00Z"^^xsd:dateTime

).

Bryan - would it be possible to send comments relative to the editor's draft? 
That reflects changes made since the working draft including the syntax changes. 
We're racing to get a draft in preparation for Last Call and there have been 
quite a few changes (face-to-face meetings tend to result in a cascade of things 
to do).

Editors' draft:

http://www.w3.org/2001/sw/DataAccess/rq23/

	Thanks
	Andy

> 
> Thanks,
> 
> -bryan
> 
Received on Tuesday, 15 March 2005 17:16:22 GMT

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