. . . . . . . . "A subcategory of Data Dictionary and Schema that's conceptual in\r\n orientation, i.e., focused on the semantics of entity relationships --\r\n represented by a series of assertions (in a variety of notations) that\r\n cover the nature of entity and relation types."@en . . . . . "Ontology" . . . . "A collection of Entity Type and Entity Relationship Type definitions associated with a realm of discourse."@en . . . . .