. . . . . . . . "- Sect.5. Actually, ifcowl is just the ontology T-box and it does not include proper instances. It is suggested to use IFC-RDF graph (or something else) when referring to the instances. This means also that querying the ifcowl instances are not returned (cf. sect.6.1.)" . "3"^^ . . . . "2019-11-26T09:05:11+01:00"^^ . .