solveit-observable:referenceTimeSource leaf node

@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix solveit-observable: <https://ontology.solveit-df.org/solveit/observable/> .
@prefix uco-observable: <https://ontology.unifiedcyberontology.org/uco/observable/> .

solveit-observable:referenceTimeSource a owl:ObjectProperty ;
    rdfs:label "reference time source"@en ;
    rdfs:comment "The reference time source used for comparison (e.g., NTP server, GPS time, examiner's calibrated watch)."@en ;
    rdfs:domain solveit-observable:ClockOffsetMeasurement ;
    rdfs:range uco-observable:ObservableObject .