Error - QName 'foaf:title' uses an undefined prefix

I am trying to run the sparql query against northwind tutorial database and i get this error: How do i correct this error?

000012: com.complexible.stardog.plan.eval.ExecutionException: com.complexible.common.rdf.query.parser.sparql.ast.VisitorException: QName 'foaf:title' uses an undefined prefix

I am running the following query:

?emp a :Employee ;
rdfs:label ?label ;
foaf:title ?title ;
foaf:lastName ?lastName ;
foaf:firstName ?firstName .

Thank you in advance for your help

Hi Krishna,

Prefixes are basic concept in RDF that you can read about in RDF Graph Data Model - Learn about the RDF graph model used by Stardog.

Hope this helps,

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.