What is an Ontology?
An ontology is an explicit
and formal specification of a shared conceptualization of a domain of
Intension and Extension
Ontologies formalize the intensional aspects of a domain, whereas the
extensional part is provided by a knowledge base that contains assertions
about instances of concepts and relations as defined by the ontology.
Ontology Learning and Population
The process of defining and
instantiating a knowledge base is referred to as knowledge markup or
ontology population, whereas (semi-) automatic support in ontology
development is usually referred to as ontology learning.