Domain-Specific Ontology

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A Domain-Specific Ontology is an ontology that is a domain-specific KB.




Depending on the scope of the ontology, ontology may be classified as follows (see also figure above):
  • upper, generic, top-level ontology - describing general knowledge, such as what is time and what is space
  • domain ontology - describing a domain, such as medical domain or electrical engineering domain, or narrower domains, such as personal computers domain
  • task - ontology suitable for a specific task, such as assembling parts together
  • application - ontology developed for a specific application, such as assembling personal computers


  1. Several ontologies are already available on the Internet, including a few hundred more or less extensively defined concepts.
  2. For example, it has been claimed by several researchers (e.g., Oltramari et al., 2002) that in WordNet there is no clear separation between concept-synsets, instance-synsets, relation-synsets, and meta-property-synsets.



  • (Mizoguchi et al., 1995) ⇒ R. Mizoguchi J. Van Welkenhuysen, and M. Ikeda. (1995). “Task Ontology for Reuse of Problem Solving Knowledge.” Towards Very Large Knowledge Bases, N.J.I. Mars, ed., IOS Press.


  • (Mahesh and Nirenburg, 1995) ⇒ Kavi Mahesh, and Sergei Nirenburg (1995). “A Situated Ontology for Practical NLP.” In: Proceedings of the Workshop on Basic Ontological Issues in Knowledge Sharing, International Joint Conference on Artificial Intelligence (IJCAI 1995).