By Asunción Gómez-Pérez PhD, MSc, MBA, Mariano Fernández-López PhD, MSc, Oscar Corcho MSc (auth.)

Ontological Engineering refers back to the set of actions that challenge the ontology improvement procedure, the ontology lifestyles cycle, the tools and methodologies for development ontologies, and the device suites and languages that aid them. over the last decade, expanding realization has been inquisitive about ontologies and Ontological Engineering. Ontologies are actually conventional in wisdom Engineering, synthetic Intelligence and desktop technological know-how; in functions regarding wisdom administration, usual language processing, e-commerce, clever integration details, details retrieval, integration of databases, b- informatics, and schooling; and in new rising fields just like the Semantic internet. fundamental ambitions of this ebook are to acquaint scholars, researchers and builders of knowledge structures with the elemental innovations and significant problems with Ontological Engineering, in addition to to make ontologies extra comprehensible to these laptop technology engineers that combine ontologies into their details structures. now we have paid particular recognition to the effect that ontologies have at the Semantic internet. tips that could the Semantic net seem in the entire chapters, yet specifically within the bankruptcy on ontology languages and tools.

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Three classes are defined on the ontology Physical-Quantities: Unit-Of-Measure, System-of-Units, and Physical-Dimension. 18: Relationships between the ontologies Standard-Units, Physical-Quantities and Standard-Dimensions. ) that are instances of the class Unit-of-Measure defined in the ontology Physical-Quantities. All the Theoretical Foundations of Ontologies x 41 units have a property that indicates the dimension of the aforesaid unit. These dimensions are defined in the Standard-Dimensions Ontology.

Class. Frame. Frame can be either a class or an individual. Facets and types of facets A facet is a slot property. In the FO facets are defined as ternary relations that hold between a frame (which can be either a class or an individual), a slot, and the facet. Common facets in the frame-based KR paradigm are, for example, those that define the cardinality of a slot, the type of a slot, and default values. Frame. Frame. Frame. x Chapter 4 shows how to build ontologies with the FO and with the OKBC primitives in Ontolingua.

X Classes rdf:Bag, rdf:Seq and rdf:Alt. They define the classes of collections (aka containers), and these can be unordered, ordered and alternative respectively. While it is clear what we mean by unordered and ordered collections, alternative collections may not be so. An alternative collection contains a set of resources from which we must select one for the single value of a property. For example, an alternative collection could be used to represent the values “single”, “double” or “triple” for the attribute occupancy of a RoomReservation.

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