Re: [Rdfapi-php-interest] SPARQL query with FILTER not working

[Seaborne, A. <and...@hp...>]

GSO wrote:
> A basic test statement - this works fine without the FILTER added, but
> returns a boolean false as a result with:
> 
> PREFIX ll: <http://www.gsowww.uklinux.net/librarylinks/vocabulary#>
> SELECT *
> WHERE { ?url ll:title ?title .
> 	?url ll:abstract ?abstract .
> 	?url ll:date ?date .
> 	?url ll:publisher ?publisher .
> 	FILTER ?date >= 0

Firstly, that isn't valid SPARQL syntax - should be FILTER (?date >= 0). May 
be that is confusing it.

Assuming, it's not that, if ?date is a string, then it is false (it's a type 
error).  Literals obey datatyping.

In SPARQL, you can cast to an integer with xsd:integer(?date).

	Andy

> }
> ORDER BY DESC(?date)
> 
> '?date' is a number created with mktime(), e.g., Literal: 1112486400.
> 
> If anyone can figure the bug in this I'd very much appreciate it.
> 
> Thanks
> 
> GSO
> http://www.gsowww.uklinux.net/pub
> 
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to share your
> opinions on IT & business topics through brief surveys - and earn cash
> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> _______________________________________________
> Rdfapi-php-interest mailing list
> Rdf...@li...
> https://lists.sourceforge.net/lists/listinfo/rdfapi-php-interest