Directory Sites

  • DAML Ontology Library

    An index of more than 200 publicly available ontologies expressed in DAML.

    www.daml.org

  • The Enterprise Ontology

    Collection of terms and definitions relevant to business enterprises. Developed in the Enterprise Project by the Artificial Intelligence Applications Institute at the University of Edinburgh.

    www.aiai.ed.ac.uk

  • ThoughtTreasure

    A web-accessible ontology system with terms in English and French. A downloadable version is also available.

    www.signiform.com

  • OWL Ontology Library

    A selection of OWL ontologies usable in Protégé.

    protege.stanford.edu

  • Ontology for Geographic Information and Metadata

    An OWL publication of the ISO 19115 standard, from Drexel University.

    loki.cae.drexel.edu

  • Open Biological Ontologies

    Provides access to controlled vocabularies for shared use across different domains, like MESH and Gene Ontology.

    obo.sourceforge.net

  • National Cancer Institute Thesaurus

    An OWL translation of the NCI Thesaurus, available for download (32 Mb) or online viewing.

    www.mindswap.org

  • Descriptive Ontology for Linguistic and Cognitive Engineering

    DOLCE is the first module of the WonderWeb Foundational Ontologies Library (WFOL).

    www.loa-cnr.it

  • Business Process Management Ontology

    BPMO is an integrated information model including business process design, project management, requirements management, and business performance management.

    www.bpiresearch.com

  • AKT Reference Ontologies

    Various ontologies developed in the framework of the Advanced Knowledge Technologies project. Includes a portal ontology.

    www.aktors.org

  • Semantic Web for Earth and Environmental Terminology

    Several ontologies published by the Jet Propulsion Laboratory in OWL format. Includes Space, Units, Earth Realms, Phenomena, Physical Properties, Substances and Units.

    sweet.jpl.nasa.gov

  • OpenCyc

    OpenCyc is the open source version of the Cyc technology, the world's largest and most complete general knowledge base and commonsense reasoning engine.

    www.cyc.com

  • Suggested Upper Merged Ontology

    A free, formal ontology in first order logic with domain ontologies totalling 20,000 concepts and 60,000 axioms, with mappings to all of WordNet.

    www.ontologyportal.org

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