Hi Christian,
What Ivan is trying to say is that we should use xsd:double instead
since it matches better with the conception of decimal-point numbers
like geo-coordinates.
Regards
Rajeev J Sebastian
On Jan 20, 2008 5:09 PM, Christian Becker <ch...@beckr.org> wrote:
> Hi Ivan,
> I see that xsd:floats are not returned for SPARQL queries, either.
> Note that one can't always choose another datatype - for DBpedia 3.0
> we just changed all geocoordinates to xsd:float to match the related
> ontology.
> I'd just like to cast my vote for xsd:float support - apart from the
> fact that it is a popular datatype, there's a ton of cool stuff to be
> done with DBpedia's geocoordinates that I would love to see working
> again on the public SPARQL endpoint.
>
> Thanks,
>
> Christian
>
>
> On Jan 19, 2008, at 10:20 PM, Ivan Mikhailov wrote:
>
> > Hello Rajeev,
> >
> > The strongly advised workaround is to use xsd:doublePrecision
> > instead of
> > xsd:float. The problem with float is that it is not enough precise.
> > Depending on hardware platform and C library used by compiler same
> > literal can be parsed and then printed as, say, "4.1299999999" or
> > "4.13", sooner or later it results in weird errors. Say, one see
> > "4.1299999999" in the output and tries to delete it from graph and the
> > request deletes nothing. The issue was so annoying that we suspended
> > this support temporarily. Probably it will be fixed by converting all
> > xsd:floats into xsd:doublePrecision literals; but that will raise some
> > other error -- unexpected return values of DATATYPE() SPARQL built-in
> > function.
> >
> > Best Regards,
> > Ivan Mikhailov
> > OpenLink Software.
> >
> > On Sat, 2008-01-19 at 05:51 +0530, Rajeev J Sebastian wrote:
> >> Hello all,
> >>
> >> I am running Virtuoso Version 05.00.3023-pthreads.
> >>
> >> When running a sparul something like:
> >>
> >> insert {
> >> <foo:xyz> <foo:left>
> >> "21.0396039604"^^<http://www.w3.org/2001/XMLSchema#float
> >> >.
> >> }
> >>
> >> I get an error, "37000 Error SP031: SPARQL compiler: Current
> >> implementation of SPARQL does not supports literals of type REAL"
> >>
> >> How can I workaround this error ?
> >>
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