I have composed a complex SPARQL query, all subparts of which execute successfully with no errors. However, when I combine all parts together, I get the following error returned:
"22023 Error SR008: Function id_to_iri needs an IRI_ID or NULL as argument 1, not an arg of type VARCHAR (182)" When I remove either of two (unrelated) subparts of the query, the first of which would return the rdf:type of an entity, and the second of which would return the rdfs:label of an entity meeting specific restrictions, the query works. Does anyone know how to interpret this error message, or its cause? Cheers, Alison Callahan
