Preferred Name





alternative term


BFO CLIF specification label


BFO OWL specification label


editor note

BFO 2 Reference: In all areas of empirical inquiry we encounter general terms of two sorts. First are general terms which refer to universals or types:animaltuberculosissurgical procedurediseaseSecond, are general terms used to refer to groups of entities which instantiate a given universal but do not correspond to the extension of any subuniversal of that universal because there is nothing intrinsic to the entities in question by virtue of which they – and only they – are counted as belonging to the given group. Examples are: animal purchased by the Emperortuberculosis diagnosed on a Wednesdaysurgical procedure performed on a patient from Stockholmperson identified as candidate for clinical trial #2056-555person who is signatory of Form 656-PPVpainting by Leonardo da VinciSuch terms, which represent what are called ‘specializations’ in [81

Entity doesn't have a closure axiom because the subclasses don't necessarily exhaust all possibilites. For example Werner Ceusters 'portions of reality' include 4 sorts, entities (as BFO construes them), universals, configurations, and relations. It is an open question as to whether entities as construed in BFO will at some point also include these other portions of reality. See, for example, 'How to track absolutely everything' at


An entity is anything that exists or has existed or will exist. (axiom label in BFO2 Reference: [001-001])


example of usage

the Second World War

Julius Caesar

Verdi’s Requiem

your body mass index










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Delete Mapping To Ontology Source Semanticscience Integrated Ontology LOOM National Cancer Institute Thesaurus LOOM Ontology of Genes and Genomes LOOM Ontology of Genes and Genomes SAME_URI Basic Formal Ontology LOOM Basic Formal Ontology SAME_URI Ontology for General Medical Science LOOM Ontology for General Medical Science SAME_URI GenEpiO LOOM GenEpiO SAME_URI Cell Line Ontology Subset for Chinese National Infrastructure of Cell Line Resource (NICR) LOOM Cell Line Ontology Subset for Chinese National Infrastructure of Cell Line Resource (NICR) SAME_URI Information Artifact Ontology LOOM Information Artifact Ontology SAME_URI International Classification of Diseases Ontology LOOM International Classification of Diseases Ontology SAME_URI Cell Line Ontology (Chinese Translation) SAME_URI Ontology for Biomedical Investigations LOOM Ontology for Biomedical Investigations SAME_URI Environment Ontology LOOM Environment Ontology SAME_URI Coronavirus Infectious Disease Ontology LOOM Coronavirus Infectious Disease Ontology SAME_URI Informed Consent Ontology LOOM Informed Consent Ontology SAME_URI Infectious Disease Ontology LOOM Infectious Disease Ontology SAME_URI Traditional Chinese Drug Ontology LOOM Traditional Chinese Drug Ontology SAME_URI Semantic Types Ontology LOOM Logical Observation Identifier Names and Codes LOOM MedlinePlus Health Topics LOOM Semantic Types Ontology LOOM Medical Subject Headings LOOM International Classification of Diseases, Version 10 - Clinical Modification LOOM Online Mendelian Inheritance in Man LOOM Semantic Types Ontology LOOM