@prefix dcterms: <http://purl.org/dc/terms/> .
@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#> .

sco:CollectiveDrift a owl:Class ;
    rdfs:label "Collective Drift" ;
    dcterms:bibliographicCitation "Gulla et al. (2010). Concept exposed to extrinsic but not intrinsic drift." ;
    rdfs:comment "Entire ontology drifts consistently together; domain evolved but ontology remains internally coherent." ;
    rdfs:subClassOf sco:ExtrinsicDrift ;
    skos:definition "A pattern of semantic drift wherein all concepts in an ontology exhibit extrinsic drift but minimal intrinsic drift, indicating domain-wide evolution with preserved internal consistency." .