CI test for duplicate IDs

[netfl0]

CI test should reject if this query returns any results.

PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX d3f: <http://d3fend.mitre.org/ontologies/d3fend.owl#>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>

SELECT (COUNT(?s) AS ?count) ?o
WHERE {
  ?s rdfs:subClassOf* d3f:DefensiveTechnique .
  ?s d3f:d3fend-id ?o .
  FILTER (!isBlank(?o))
}
GROUP BY ?o
HAVING (COUNT(?s) > 1)
ORDER BY DESC(?count)

example query.