Table 5 Example competency question testing evidence

From: Robust requirements gathering for ontologies in smart water systems

Natural language question
What is Pipe X’s material?
SPARQL query
PREFIX wis: < https://www.WISDOM.org/WISDOMontology# > 
PREFIX rdf: < https://www.w3.org/1999/02/22-rdf-syntax-ns# > 
PREFIX dul: < https://www.loa-cnr.it/ontologies/DUL.owl# > 
SELECT ?material
WHERE {
wis:Pipe_01 rdf:type wis:Main
wis:Pipe_01 wis:hasMaterial ?material}
Output (CSV format)
material
wis:PVC