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The Web Ontology Language (OWL) is a family of knowledge representation languages for authoring ontologies.Ontologies are a formal way to describe taxonomies and classification networks, essentially defining the structure of knowledge for various domains: the nouns representing classes of objects and the verbs representing relations between the objects.
Multimedia Ontology language (M-OWL) is an ontology representation language that enables such perceptual modeling. It assumes a causal model of the world, where observable media features are caused by underlying concepts. In MOWL, it is possible to associate different types of media features in different media format and at different levels of ...
OWL-S is an ontology built on top of Web Ontology Language (OWL) by the DARPA DAML program. [1] It replaces the former DAML-S ontology. "OWL-S is an ontology, within the OWL-based framework of the Semantic Web, for describing Semantic Web Services. It will enable users and software agents to automatically discover, invoke, compose, and monitor ...
Semantic Application Design Language (SADL) is an English-like open source language for building formal models composed of an OWL ontology, rules expressed in terms of the ontological concepts, queries for retrieving information from the model, and tests to validate and re-validate model content and entailments (implications).
Example of a constructed MBED Top Level Ontology based on the nominal set of views. [1]In computer science, information science and systems engineering, ontology engineering is a field which studies the methods and methodologies for building ontologies, which encompasses a representation, formal naming and definition of the categories, properties and relations between the concepts, data and ...
Ontology Design Patterns portal [76] is a wiki repository of reusable components and practices for ontology design, and also maintains a list of exemplary ontologies. Protégé Ontology Library [77] contains a set of OWL, Frame-based and other format ontologies. SchemaWeb [78] is a directory of RDF schemata expressed in RDFS, OWL and DAML+OIL.
A class can be defined either by extension (specifying members), or by intension (specifying conditions), using what is called in some ontology languages like OWL. According to the type–token distinction, the ontology is divided into individuals, who are real worlds objects, or events, and types, or classes, who are sets of real world objects ...
The ontology language OWL uses blank nodes to represent anonymous classes such as unions or intersections of classes, [3] or classes called restrictions, defined by a constraint on a property. [ 4 ] For example, to express that a person has at most one birth date, one will define the class "Person" as a subclass of an anonymous class of type ...