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BFO repository including source code and latest documents
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docs BFO hierarchy Jul 22, 2018
releases update links of documents Aug 29, 2015
src Removed annotations not associated with any entities, fixed issue: #222 Feb 21, 2019 Update Mar 19, 2019
bfo.owl Fixed SKOS URL Nov 4, 2009
bfo_classes_only.owl BFO 2.0 classes only release generated using Robot tool Feb 21, 2019
rel.owl first and early May 18, 2010
ro.owl Removed protege-dc import May 20, 2009

Basic Formal Ontology (BFO)

The Basic Formal Ontology (BFO) is a small, upper-level ontology that is designed for use in supporting information retrieval, analysis and integration in scientific and other domains. BFO is a genuine upper ontology. Thus it does not contain physical, chemical, biological or other terms which would properly fall within the coverage domains of the special sciences. BFO is used by more than 130 ontology-driven endeavors throughout the world.

The BFO project was initiated in 2002 under the auspices of the project Forms of Life sponsored by the Volkswagen Foundation. The theory behind BFO was developed first by Barry Smith and Pierre Grenon and presented in a series of publications listed here.

Since then important contributions to BFO have been made by many people, including:

... and by more than hundred other members of the BFO Discussion Group.

News: BFO 2.0 Now Released


Current Version: 2.0

Previous Version: 1.1.1



Code license: New BSD License

Content license: Creative Commons 4.0 BY

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