https://w3id.org/rec#timestamp
owl:DatatypeProperty
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix rec: <https://w3id.org/rec#> .
rec:timestamp a owl:DatatypeProperty ;
rdfs:label "timestamp"@en .