Omega Ontology
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An Omega Ontology is an Ontology produced and managed by ISI.
- Context:
- It is a successor to SENSUS.
- It is a General Ontology.
- It has few Semantic Relations between Ontology Concepts.
- It was actively developed between 2004 and 2008 (http://web.archive.org/web/*/http://omega.isi.edu/)
- Omega 5 Omega 5 consists of an Upper Model of approximately 200 nodes and the ontology body. The Upper Model nodes are hand-build to represent high-level important generalizations that help organize the remaining nodes. The Upper Model is organized into two primary branches: Objects and Eventualities. The Object nodes taxonomize all objects/entities (typically, pools of noun senses) into approximately 35 classes, and the Eventuality nodes define approximately 20 classes for processes/events (typically, pools of verb senses). Upper Model nodes introduce definitional features — atomic terms like +concrete, -concrete, +animate, etc. — that specify aspects of the concepts they govern.
- It may contain (in the future) a branch for Qualities/Properties.
- See: Eduard Hovy.
References
2007
- http://omega.isi.edu/doc/what_is.html
- Omega is a 120,000-node terminological ontology constructed at USC ISI as the reorganization and synthesis of WordNet (versions 2.0 and 2.1), which is a lexically oriented network constructed on general cognitive principles; and Mikrokosmos, a conceptual resource originally conceived to support translation, into a new upper model, created expressly in order to facilitate the merging of lower models into a functional whole. Omega, like its close predecessor SENSUS, can be characterized as a "shallow", lexically oriented, term taxonomy. By far the majority of its concepts can be stated in English by a single word. Omega contains no formal concept definitions and only relatively few interconnections (semantic relations) between concepts. By making few commitments to either specific theories of semantics or particular representations, Omega enjoys a malleability that has allowed it to be used in a wide variety of applications, from translation to question answering to information integration.
- See also:
- Semi-automatic Construction of a General Purpose Ontology doc 126K
- The Omega Ontology (draft submission) pdf 80k
- Methodologies for the Reliable Construction of Ontological Knowledge pdf 221K
2005
- (Philpot et al., 2005) ⇒ Andrew Philpot, Eduard Hovy, and Patrick Pantel. (2005). “The Omega Ontology.” In: Proceedings of the ONTOLEX Workshop at the International Conference on Natural Language Processing.