Assertion: ontology | /r/HasProperty | described
Facets:
value: formally
type: MANNER
value: usually
type: DEGREE
Source sentences:
text: There are three main components to an ontology, which are usually described as follows:
text: Although it is required from an ontology to be formally defined, there is no common definition of the term "ontology" itself.
text: Like any other resources, ontologies also need to be described.