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Ontology engineering in computer science and information science is a new field, which studies the methods and methodologies for building ontologies: formal representations of a set of concepts within a domain and the relationships between those concepts. A large scale representation of abstract concepts such as actions, time, physical objects and beliefs would be an example of ontological engineering^{[citation needed]}

[Ontology engineering] aims at making explicit the knowledge contained within software applications, and within enterprises and business procedures for a particular domain. Ontology engineering offers a direction towards solving the inter-operability problems brought about by semantic obstacles, i.e. the obstacles related to the definitions of business terms and software classes. Ontology engineering is a set of tasks related to the development of ontologies for a particular domain.

— Line Pouchard, Nenad Ivezic and Craig Schlenoff, Ontology Engineering for Distributed Collaboration in Manufacturing^[2]

Ontologies provide a common vocabulary of an area and define, with different levels of formality, the meaning of the terms and the relationships between them. During the last decade, increasing attention has been focused on ontologies. Ontologies are now widely used in knowledge engineering, artificial intelligence and computer science; in applications related to areas such as knowledge management, natural language processing, e-commerce, intelligent information integration, bio-informatics, education; and in new emerging fields like the semantic web. Ontological engineering is a new field of study concerning the ontology development process, the ontology life cycle, the methods and methodologies for building ontologies^[3]^[4], and the tool suites and languages that support them.

Ontology languages

Further information: ontology language

An ontology language is a formal language used to encode the ontology. There are a number of such languages for ontologies, both proprietary and standards-based:

Common logic is ISO standard 24707, a specification for a family of ontology languages that can be accurately translated into each other.
The Cyc project has its own ontology language called CycL, based on first-order predicate calculus with some higher-order extensions.
The Gellish language includes rules for its own extension and thus integrates an ontology with an ontology language.
IDEF5 is a software engineering method to develop and maintain usable, accurate, domain ontologies.
KIF is a syntax for first-order logic that is based on S-expressions.
Rule Interchange Format (RIF) and F-Logic combine ontologies and rules.
OWL is a language for making ontological statements, developed as a follow-on from RDF and RDFS, as well as earlier ontology language projects including OIL, DAML and DAML+OIL. OWL is intended to be used over the World Wide Web, and all its elements (classes, properties and individuals) are defined as RDF resources, and identified by URIs.
XBRL (Extensible Business Reporting Language) is a syntax for expressing business semantics.

Ontology Engineering In Life Sciences

Life sciences is flourishing with ontologies that biologists use to make sense of their experiments. For inferring correct conclusions from experiments, ontologies have to be structured optimally against the knowledge base they represent. The structure of an ontology needs to be changed continuously so that it is an accurate representation of the underlying domain.
Recently, an automated method was introduced for engineering ontologies in life sciences such as Gene Ontology (GO)^[5], one of the most successful and widely used biomedical ontology.^[6] Based on information theory, it restructures ontologies so that the levels represent the desired specificity of the concepts. Similar information theoretic approaches have also been used for optimal partition of Gene Ontology.^[7] Given the mathematical nature of such engineering algorithms, these optimizations can be automated to produce a principled and scalable architecture to restructure ontologies such as GO.

Tools for ontology engineering

DOGMA
DogmaModeler
KAON
OntoClean
OnToContent
HOZO
Protégé (software)

References

This article incorporates public domain material from websites or documents of the National Institute of Standards and Technology.

^ Peter Shames, Joseph Skipper. "Toward a Framework for Modeling Space Systems Architectures". NASA, JPL.
^ Line Pouchard, Nenad Ivezic and Craig Schlenoff (2000) "Ontology Engineering for Distributed Collaboration in Manufacturing". In Proceedings of the AIS2000 conference, March 2000.
^ Asunción Gómez-Pérez, Mariano Fernández-López, Oscar Corcho (2004). Ontological Engineering: With Examples from the Areas of Knowledge Management, E-commerce and the Semantic Web. Springer, 2004.
^ A. De Nicola, M. Missikoff, R. Navigli (2009). "A Software Engineering Approach to Ontology Building". Information Systems, 34(2), Elsevier, 2009, pp. 258-275.
^ G. Alterovitz, M. Xiang, D.P. Hill, J. Lomax, J. Liu, M. Cherkassy, J. Dreyfuss, C. Mungall, M.A. Harris, M.E. Dolan, J. Blake & M. Ramoni. "Ontology Engineering", Nature Biotechnology,2010; 28(2: 128-130. pmid=20139945
^ M. Ashburner et al. "Gene Ontology: Tool for the Unification Biology. The Gene Ontology Consortium", Nature Genetics, 2000 25(1): 25-29
^ G. Alterovitz, M. Xiang, M Mohan, MF. Ramoni. "GO PaD: the Gene Ontology Partition Database", Nucleic Acids Research, 2007; 35(Database issue):322-327

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