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

[GSO <gs...@ya...>]

OK, you're right by the looks about not using valid syntax, however
the problem changes when I use parentheses, I then get the following
error:

<quote>
SPARQL PARSER ERROR: ) is neither a valid rdf- node nor a variable.
In Query:

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->)<-

Fatal error:  Call to a member function getFromNamedPart() on a
non-object in /opt/lampp/htdocs/rdfapi-php/api/sparql/SparqlEngine.php
on line 417
</quote>

The closing/right parenthesis causes an error.

GSO


On 28/11/06, Seaborne, Andy <and...@hp...> wrote:
>
>
> 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
> >
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