Eddy Vanderlinden wrote: > Hello, > > Sorry for my 2 stupid questions which will have a sound and simple reply > but I no-where found any answer in the documentation. > > 1. A simple SPARQL select query: > I've been running similar to the next query, in hundreds of variants > (with parameters) but I don't get a reply in Virtuoso: > > PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> > SELECT ?s ?p ?pl ?o > where { > <#SdnEntry_2786786> ?p ?o . > ?p rdfs:label ?pl . > } > The aim is just to get the labels of the properties in the output. > The query runs successfully in other SPARQL engines with the same data. > > When I make the union: > PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> > SELECT ?s ?p ?pl ?o > where { > {<#SdnEntry_2786786> ?p ?o} > UNION > {?p rdfs:label ?pl} > } > I get the pairs property/value and property/label separately. > So, I can't filter the result neither. > > My question: what am I missing here ?
newb myself, but looks like you've got select ?s but no ?s param in the query(ies) regards!
