The Foundational Model of Anatomy Ontology or the FMA, is a reference ontology for the domain of anatomy. It is a symbolic representation of the canonical, phenotypic structure of an organism; a spatial-structural ontology of anatomical entities and relations which form the physical organization of an organism at all salient levels of granularity.
FMA is developed and maintained by the Structural Informatics Group at the University of Washington.
FMA ontology contains approximately 94,000 classes and over 170,000 terms, over 2.4 million relationship instances from over 227 relationship types.
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