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Synonyms

computational ontology, semantic data model, ontological engineering




Definition

In the context of computer and information sciences, an ontology defines a set of representational primitives with which to model a domain of knowledge or discourse. The representational primitives are typically classes (or sets), attributes (or properties), and relationships (or relations among class members). The definitions of the representational primitives include information about their meaning and constraints on their logically consistent application.

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ontology definition semantic_web

Now we are able to define a Service Oriented Architecture (SOA). SOA is an architectural style whose goal is to achieve loose coupling among interacting software agents. A service is a unit of work done by a service provider to achieve desired end results for a service consumer. Both provider and consumer are roles played by software agents on behalf of their owners.

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soa semantic definition reference architecture

Tom Gruber at Stanford University defines and conceptualizes ontologies as they are applied to the semantic web.

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ontology definition semantic_web technical_discussion

A semantic network is a directed graph consisting of nodes (also termed points or vertices) which represent concepts and edges (also termed lines or arcs) which represent semantic relations between the concepts. A kind of knowledge representation used, for example, in hypertext systems.

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semantic semantic-networks definition reference_articles

This document concerns the management of the output of insight generators, the software agents utilized in the insight generation systems. The solution to managing these reports involves the automatic creation of a repository for all materials generated by various insight generators; this repository allows the user to navigate through this continually growing space of marketing reports, gaining new insights about the relationships between items of interest and adding new insights in the process. The goal of the system is to make all marketing information and insights generated by the man/machine interaction available to the user, so that there is a convergence towards a "conservation of information". To use a geometric metaphor, the goal is to make the user equidistant from all information at all times, as illustrated below.

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semantic semantic-networks definition detail_explanations

John F. Sowa - This is a revised and extended version of an article that was originally written for the Encyclopedia of Artificial Intelligence, edited by Stuart C. Shapiro, Wiley, 1987, second edition, 1992.

A semantic network or net is a graphic notation for representing knowledge in patterns of interconnected nodes and arcs. Computer implementations of semantic networks were first developed for artificial intelligence and machine translation, but earlier versions have long been used in philosophy, psychology, and linguistics.

What is common to all semantic networks is a declarative graphic representation that can be used either to represent knowledge or to support automated systems for reasoning about knowledge. Some versions are highly informal, but other versions are formally defined systems of logic. Following are six of the most common kinds of semantic networks, each of which is discussed in detail in one section of this article.

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semantic comparative-analysis semantic-networks definition detail_explanations

Relaxed alertness is accompanied in many people by the alpha rhythm, a rather regular, sinusoidal rhythm whose frequency varies from about 8 to 13 cps, although in a single person the frequency is relatively constant. As a person becomes drowsy, this alpha rhythm breaks up, clusters of it becoming less and less frequent as they are replaced by a stage- 1 drowsy pattern. Consciousness waxes and wanes with the alpha rhythm, although it is impossible to say clearly at exactly what point consciousness is lost

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brain_based_learning relaxed_alertness definition