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Ontologies
IS 277
Spring 2005
Outline Ontologies Types of ontologies Examples Ontology engineering Ontology standards Machine-readable ontologies
Ontologies
Ontos logos A theory of existence What the world is made of But only a theory Machine-readable
Types of ontologies
Document Metadata Domain Service
Examples Atomism Data models Taxonomies / classifications Controlled vocabularies Cataloguing standards
Ontology engineering Well-defined Coherent Extensible Modular Layered Independent of applications Minimal commitments
Ontology standards Islands of automation User groups Standards organizations Can fail Multiple, diverse standards Translation among them
Machine-readable ontologies Standardized ways of writing down
ontology standards XML, RDF, and OWL “Meaning” conferred by software
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