Frans,
On 17 Mar 2014, at 15:53, Frans Knibbe | Geodan <frans.kni...@geodan.nl> wrote:
> On 2013-11-08 7:37, Quentin wrote:
>> Is it likely that Virtuoso 7 will come to support xsd:boolean without
>> integer conversion?
>>
>>
> A good question. I have just noticed that when I import boolean literals
> they are converted to integers. That's using Virtuoso 7.1. Apparently it
> has to do with there not being a boolean SQL datatype in Virtuoso. And I
> can imagine there is no urgency to have that, because other SQL
> datatypes can manage the boolean concept quite well. But I suspect that
> is plenty of need for a boolean datatype in RDF output.
>
> Is there a known workaround for this problem? Some trick to have the
> ones or zeroes converted to true or false in RDF output? For instance,
> is it possible to attach a function to a certain set of objects, to be
> executed when the object value is read?
[Hugh] Coincidentally this ongoing issue with xsd:boolean was being discussed
internally earlier today and a fix for this will be available later this week
such that xsd:boolean types can be inserted and queried as follows:
Data Creation:
with graph <g1>
insert { <strue> <p1> "true"^^xsd:boolean .
<sfalse> <p1> "false"^^xsd:boolean }
Queries:
select * from <g1> where {?s ?p "false"^^xsd:boolean}
and
select * from <g1> where {?s ?p "0"^^xsd:boolean}
return same solution ...
Regards
Hugh
>
> Regards,
> Frans
>
>
>
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