I use a private version of DBpedia on a Virtuoso 7 compiled by myself from
the stable branch.
Yes, "http://www.w3.org/2001/XMLSchema#date"; is the same thing than
str(xsd:date).
But yes your post is approximatively the same thing than my problem, so I
think the problem come from this function because doesn't matter which type
I try to compare it doesn't works with the "prefix version" but only with
the "full version" of a type.
Best.
Julien.
2013/10/25 Joshua TAYLOR <joshuaaa...@gmail.com>
> Also, just to be clear,
>
> filter(datatype(?death) = "http://www.w3.org/2001/XMLSchema#date";).
>
> should be the same as
>
> filter(datatype(?death) = str(xsd:date) ).
>
> right?
>
> On Fri, Oct 25, 2013 at 12:09 PM, Joshua TAYLOR <joshuaaa...@gmail.com>
> wrote:
> > Are you querying locally, or against the public endpoint? Have a look
> > at the "Additional Strange Results" in this Stack Overflow question
> > and answer:
> >
> > http://stackoverflow.com/a/18793319/1281433
> >
> > I had some weird results while querying DBpedia and trying to work
> > with dates and datetimes. This may or may not be related.
> >
> > On Fri, Oct 25, 2013 at 11:35 AM, Julien Plu
> > <julien....@redaction-developpez.com> wrote:
> >> Hi,
> >>
> >> I think I found a bug with the datatype SPARQL function. This query as
> zero
> >> results :
> >>
> >> select distinct count(?birth) count(?death)
> >>
> >> where {
> >>
> >> ?entity <http://dbpedia.org/ontology/birthDate> ?birth .
> >>
> >> filter(datatype(?birth) = xsd:date).
> >>
> >> OPTIONAL {?entity <http://dbpedia.org/ontology/deathDate> ?death .
> >>
> >> filter(datatype(?death) = xsd:date).
> >>
> >> }
> >>
> >> }
> >>
> >>
> >> And this query return the good results :
> >>
> >> select distinct count(?birth) count(?death)
> >>
> >> where {
> >>
> >> ?entity <http://dbpedia.org/ontology/birthDate> ?birth .
> >>
> >> filter(datatype(?birth) = "http://www.w3.org/2001/XMLSchema#date";).
> >>
> >> OPTIONAL {?entity <http://dbpedia.org/ontology/deathDate> ?death .
> >>
> >> filter(datatype(?death) =
> >> "http://www.w3.org/2001/XMLSchema#date";).
> >>
> >> }
> >>
> >> }
> >>
> >>
> >> Have-I missed something or is-it really a bug from Virtuoso 7 ?
> >>
> >>
> >> Thanks in advance.
> >>
> >>
> >> Julien.
> >>
> >>
> >>
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> >> Virtuoso-users@lists.sourceforge.net
> >> https://lists.sourceforge.net/lists/listinfo/virtuoso-users
> >>
> >
> >
> >
> > --
> > Joshua Taylor, http://www.cs.rpi.edu/~tayloj/
>
>
>
> --
> Joshua Taylor, http://www.cs.rpi.edu/~tayloj/
>
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