Difference (from revision 12 to 13)
Changed: 7c7
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''In general''' an ontology specifies a vocabulary of concepts together with some indication of their meanings. There is a range of levels of precision with which meaning is specified, but an overall goal is for the ontology to be in form (hence it is called a formal ontology) that express a common understanding of the structure of information suitable among people and-or software agents. Often there are twin targets to make the meaning clear to people while allowing a degree of "automated" processing. In this case a formal ontology can be used to make explicit the semantics, spatial cognition and knowledge contained within efforts such as software applications. {nid 2JOA} |
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'''In general''' an ontology specifies a vocabulary of concepts together with some indication of their meanings. There is a range of levels of precision with which meaning is specified, but an overall goal is for the ontology to be in form (hence it is called a formal ontology) that express a common understanding of the structure of information suitable among people and-or software agents. Often there are twin targets to make the meaning clear to people while allowing a degree of "automated" processing. In this case a formal ontology can be used to make explicit the semantics, spatial cognition and knowledge contained within efforts such as software applications. {nid 2JOA} |
Changed: 9c9
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An ontological model is made up of classes/concepts (at least partial hierarchical) along with properties & attributes for these concepts (usually with descriptions to help humans)plus constraints on properties and attributes. The backbone on an Ontology is made up of Classes in a formal Hierarchy. Certain parts of an ontology are the primitives, foundational concepts from which other concepts are constructed. The concept of part and boundary are examples of primitives in some ontologlies. {nid 2JOB} |
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An ontological model is made up of: {nid 2JOU} |
Added: 10a11,17
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* classes/concepts (at least partial hierarchical) along with {nid 2JOV} * properties & attributes for these concepts (usually with descriptions to help humans)plus {nid 2JOW} * constraints on properties and attributes {nid 2JOX} * instances of concepts. {nid 2JOY} The backbone on an Ontology is made up of Classes in a formal Hierarchy. Certain parts of an ontology are the primitives, foundational concepts from which other concepts are constructed. The concept of part and boundary are examples of primitives in some ontologlies. {nid 2JOB} |
Changed: 23c30,31
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''' Geospatial ontologies ''' take as their domain a range of geospatial concepts such as geospatial objects (such as in the previous hydrologic example), relations (including special ones for spatial concepts) and features. {nid 2JOG} |
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''' Geospatial ontologies ''' take as their domain a range of geospatial concepts such as geospatial objects (such as in the previous hydrologic example), relations (including special ones for spatial concepts) and features. Domain ideas about such concepts can be seen in previous standards efforts such as by OGC and ISO/TC 211 General Feature Model, but traditional information models often restricted the semantics that could be expressed in such models. More recently efforts such as the W3C Incubator Group on Geospatial Ontologies has looked at "geospatial foundation ontologies to represent geospatial concepts and properties for use on the Worldwide Web" (see http://www.w3.org/2005/Incubator/geo/XGR-geo-ont-20071023/) {nid 2JOG} |