ConceptDescription logic Family of decidable logics for describing concepts and their relations; the formal basis of OWL. subject of Expressiveness and Tractability in Knowledge Representation and Reasoning writing 1987 [src] From SHIQ and RDF to OWL: The Making of a Web Ontology Language writing 2003 [src] influenced by An Overview of the KL-ONE Knowledge Representation System writing 1985 [src] built upon by DAML+OIL standard 2001 [src] OWL standard 2004 [src] Sources https://en.wikipedia.org/wiki/Description_logic