https://www.omg.org/spec/Commons/DatesAndTimes/hasStartDate
rdf:Property
@prefix cmns-dt: <https://www.omg.org/spec/Commons/DatesAndTimes/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
cmns-dt:hasStartDate a rdf:Property .