# Construct occupation instances.
# Existing schema:Occupation instances pass through.
# migrants:Profession instances are retyped as schema:Occupation.

PREFIX rdfs:     <http://www.w3.org/2000/01/rdf-schema#>
PREFIX skos:     <http://www.w3.org/2004/02/skos/core#>
PREFIX schema:   <https://schema.org/>
PREFIX migrants: <http://example.org/migrants/>

CONSTRUCT {
  ?s a schema:Occupation .
  ?s schema:name ?name .
}
WHERE {
  ?s a schema:Occupation .
  OPTIONAL { ?s schema:name ?name }
}
;
CONSTRUCT {
  ?s a schema:Occupation .
  ?s a skos:Concept .
  ?s rdfs:label ?label .
  ?s skos:prefLabel ?prefLabel .
  ?s schema:name ?label .
}
WHERE {
  ?s a migrants:Profession .
  OPTIONAL { ?s rdfs:label ?label }
  OPTIONAL { ?s skos:prefLabel ?prefLabel }
}