Hi Jerven, Either ?sub or ?super (or both) should appear in some non-transitive triple pattern to specify at least one of transitive ends.
See the following property path examples:
http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtTipsAndTricksSPARQL11PropertyPaths
Best Regards
Hugh Williams
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On 14 May 2013, at 09:16, Jerven Bolleman <[email protected]> wrote:
> Hi All,
>
> When executing
>
> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
>
> CONSTRUCT
> { ?sub rdfs:subClassOf ?super .}
> FROM <http://purl.uniprot.org/go/>
> WHERE
> { ?sub (rdfs:subClassOf)* ?super }
>
> I get the following exception.
>
> Query evaluation failed:PREFIX
> rdfs:<http://www.w3.org/2000/01/rdf-schema#> CONSTRUCT {?sub
> rdfs:subClassOf ?super} FROM <http://purl.uniprot.org/go/> WHERE {?sub
> rdfs:subClassOf* ?super}
> org.openrdf.query.QueryEvaluationException: : SPARQL execute
> failed:[PREFIX rdfs:<http://www.w3.org/2000/01/rdf-schema#> CONSTRUCT
> {?sub rdfs:subClassOf ?super} FROM <http://purl.uniprot.org/go/> WHERE
> {?sub rdfs:subClassOf* ?super}]
> Exception:virtuoso.jdbc3.VirtuosoException: TR...: transitive start
> not given
> at
> virtuoso.sesame2.driver.VirtuosoRepositoryConnection.executeSPARQLForHandler(Unknown
>
> Source)
>
>
> Regards,
> Jerven
> --
> -------------------------------------------------------------------
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