OWL-in-ObjectLogic is an (internal) serialization format for OWL. OWL-in-ObjectLogic is syntactically a subset of ObjectLogic and handled by the ObjectLogic format handlers. Thereby, the ObjectLogic format handlers can be used for OWL (and RDF as well for RDF-in-ObjectLogic) to load or save OWL-in-ObjectLogic ontologies. This functionality is available on the API level (OntologyManager.openOntology/importOntology, Ontology.saveOntology), server commands (load, save) and on OntoBroker startup (i.e. passing OWL-in-ObjectLogic ontologies when running in OWL mode).