Re: SPARQL and untyped resources

Thanks for the reply...
I found this query working quite nice:

       SELECT DISTINCT ?uri
        WHERE {
          {
            ?uri a <http://www.w3.org/2000/01/rdf-schema#Resource> .
            OPTIONAL {?uri a ?type2. FILTER(?type2 != <
http://www.w3.org/2000/01/rdf-schema#Resource>) .} .
            FILTER(!BOUND(?type2)) .
          } UNION {
            ?uri a <http://www.w3.org/2002/07/owl#Thing> .
            OPTIONAL {?uri a ?type2. FILTER(?type2 != <
http://www.w3.org/2002/07/owl#Thing>) .} .
            FILTER(!BOUND(?type2)) .
          }
        }


best,

Christian

On Wed, Nov 9, 2011 at 4:09 PM, Aidan Hogan <aidan.hogan@deri.org> wrote:

> To add to Irene's answer, you can also do negation-as-failure in SPARQL
> (1.0):
>
> PREFIX ...
> SELECT ?s
> WHERE ?s {
>  ?s ?p ?o .
>  OPTIONAL { ?s a ?type . FILTER (?type != rdfs:Resource) }
>  FILTER (!bound(?type))
> }
>
> (BTW, not sure what you mean by "auto-typing" here unless maybe you mean
> through something like the rdfs4* rules.)
>
>
> On 08/11/2011 18:05, Irene Celino wrote:
> > If you're using SPARQL 1.1, you can use FILTER NOT EXISTS or MINUS,
> > see: http://www.w3.org/TR/sparql11-**query/#negation<http://www.w3.org/TR/sparql11-query/#negation>
> >
> > HTH,
> > Irene
> >
> > Il 08 novembre 2011 17:23, Christian Morbidoni
> > <christian.morbidoni@gmail.com**>  ha scritto:
> >> Hi all,
> >> I'm trying to build a SPARQL query that selects all the resources that
> are
> >> ONLY rdfs:Resources (untyped let's say).
> >> What I need is to identify those resources that do not have an explicit
> >> rdf:type, thus are of rdf:type rdfs:Resource.
> >> In the past I did it in Serql using the MINUS construct...but when it
> comes
> >> to sparql I don't know how to solve it...
> >> Could anyone help me out please?
> >> best,
> >> Christian
> >
> >
> >
>
>