Ontology for Representing CDM Semantics The Biblioteko Ontology Source
http://purl.obolibrary.org/obo/IAO_0020000 http://id.loc.gov/ontologies/bibframe/Identifier LOOM
http://purl.obolibrary.org/obo/IAO_0000010 http://bibliotek-o.org/1.1/ontology/Software LOOM