Experimental Factor Ontology (EFO)

Ontology Info

Field	Value
Acronyme	EFO
Description	The Experimental Factor Ontology (EFO) is an application focused ontology modelling the experimental variables in multiple resources at the EBI and Open Targets. The ontology has been developed to increase the richness of the annotations that are currently made in resources and to promote consistent annotation, to facilitate automatic annotation and to integrate external data. The ontology pulls together classes from reference ontologies such as disease, cell line, cell type and anatomy and adds axiomatisation as necessary to connect areas such as disease to phenotype. Contact EFO users list for information: efo-users@ebi.ac.uk.
Format	OWL
Categories	Biological Process, Experimental Conditions
Groups

Metric	Value
Classes	66,995
Individuals	19
Properties	95
Max Depth	20
Max Child Count	6,932
Average Child Count	8
Classes With One Child	4,721
Classes With More Than 25 Children	310
Classes With No Definition	12,942