@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix sco: <http://ontextract.org/sco#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

sco:hasStartYear a owl:DatatypeProperty ;
    rdfs:label "has start year" ;
    rdfs:comment "Calendar year when semantic change began (for query convenience)." ;
    rdfs:domain sco:SemanticChangeEvent ;
    rdfs:range xsd:integer ;
    skos:definition "The calendar year marking the beginning of a semantic change event, cached from temporal interval for efficient querying." .