Ontology

EFO

Experimental Factor Ontology

The Experimental Factor Ontology (EFO) provides a systematic description of many experimental variables available in EBI databases. It combines parts of several biological ontologies, such as anatomy, disease and chemical compounds. The scope of EFO is to support the annotation, analysis and visualization of data handled by the EBI Functional Genomics Team.

assaydataplantearth sciencesessexperimental conditionexperimental measurementgenome-wide association studygenomics
C68

FAIR 41/48

Version v3.95.0

Evaluated 26 Oct 2026

How scores work

Source & access

Homepageebi.ac.uk Repositorygithub.com DownloadCanonical file / PURL Browse in OLSEMBL-EBI Ontology Lookup ServiceBrowse in BioPortalNCBO BioPortal

Portals & registries

SourceIDVersionClassesPropertiesIndividualsLoaded
OLS (EMBL-EBI)efo3.95.094,6633281925 Oct 2026
TIB Terminology Serviceefo3.83.089,3893041915 Oct 2025

Ontology IRI http://www.ebi.ac.uk/efo/efo.owl
Version IRI http://www.ebi.ac.uk/efo/releases/v3.95.0/efo.owl

Languages be bg da de en fr sq tr

Imports from (44)
AfPO BAO BFO BTO CHEBI CL CLO COB DOID ECTO FBbi FBbt FBdv GAZ GO GSSO HANCESTRO HP IAO IDO MA MONDO MP MPATH NCBITaxon NCIT OBA OBI OGMS OMIT OMO ORPHA PATO PO PR RO SCHEMAORG_HTTPS SEMAPV SO TO UBERON UO WBls ZFA

Reused by (28)
APOLLO_SV BAO BCGO BMONT CAO COVOC DIDEO DPO ENM EPIO EUPATH GENEPIO GMHO GSSO HCAO IDOCOVID19 NGBO OBIB OHPI ONS ONTONEO OOSTT ORNASEQ OVAE PRIDE RBO TXPO VALUESETS

Also registered as
aberowl: EFO agroportal: EFO bioportal: EFO fairsharing: FAIRsharing.1gr4tz ols: efo ontobee: EFO tib.ts: efo

Automated evaluation

F Findable FAIR8/12
  • Persistent identifier (F1)no PURL / w3id / DOI for the artefact0
  • Indexed in services (F4)5: OLS, TIB, BioPortal, Bioregistry, FAIRsharing+5
  • Citable reference (F2)doi:10.1093/bioinformatics/btq099+3
A Accessible FAIR12/12
  • Homepage reachableHTTP 200+3
  • Artefact retrievable over HTTP(S) (A1)download HTTP 200+6
  • Metadata persists in a registry (A2)Bioregistry+3
I Interoperable FAIR12/12
  • Formal machine-readable format (I1)OWL, OBO+5
  • Semantic-web IRIs (I2)OWL, OBO+3
  • References other vocabularies (I3)imports 44: afpo, bao, bfo, bto, chebi, cl, clo, cob…+4
R Reusable FAIR9/12
  • Clear license (R1.1)Apache-2.0+5
  • Release provenance (R1.2)v3.95.0 (version IRI in the artefact)+4
  • Community standards (R1.3)no independent compliance report (not on the OBO Dashboard)0
Q Ontology consistency & quality4/20
  • Logical consistencynever checked by a reasoner0
  • OWL 2 DL profileprofile not checked0
  • Upper-ontology alignmentimports BFO, COB+3
  • Standard relations (RO)imports RO+1
  • ROBOT report: no errorsno ROBOT report available0
  • ROBOT report: warning densityno ROBOT report available0
  • Pitfall scan: no critical pitfallsno pitfall scan or ROBOT report yet0
M Maintenance16/16
  • Recency2026-10-22 → 0.1 months (≤ 3 months)+10
  • Release cadence (12 months)12 releases (GitHub releases)+6
U Community adoption7/16
  • Documented adopting projects0 projects0
  • Reused by other ontologies28: apollo_sv, bao, bcgo, bmont, cao, covoc…+3
  • Community signalmax(stars 65 → 2, citations 534 → 4)+4
P Penalties (inactivity & inconsistency)0
  • Time since last activity0.0 years → 4 × max(0, 0.0 − 1)0
  • Inactive statusnot archived, legacy or inactive0
  • Consistencynot yet checked by a reasoner0

FAIR subtotal 41/48 · earned 68/100 = 68/100 → grade C

Community adoption 0

No adopting projects documented yet.

Know a project that uses EFO? Suggest it.

History & changes 1 run

History starts with the first archived run; changes appear after the next evaluation.

RunScoreFAIRVersion evaluatedTermsSnapshot
26 Oct 2026, 03:31 UTC68 C41v3.95.094,663JSON

Provenance

Every fact on this page was fetched automatically. Each row shows where it came from and when. If a source fails, the last good value is kept and marked “carried forward”.

FactSourceRetrieved
Homepage link check (HTTP 200)ebi.ac.uk26 Oct 2026, 02:53 UTC
Repository link check (HTTP 200)github.com26 Oct 2026, 02:53 UTC
Download link check (HTTP 200)ebi.ac.uk26 Oct 2026, 02:53 UTC
Artefact header (version IRI)release-assets.githubusercontent.com26 Oct 2026, 02:53 UTC
Git refs (commit bebd48a, latest tag v2019-03-18)github.com26 Oct 2026, 02:53 UTC
GitHub repository statisticsapi.github.com26 Oct 2026, 02:53 UTC
OLS classes, imports, version & releaseebi.ac.uk26 Oct 2026, 02:53 UTC
TIB Terminology Service metricsservice.tib.eu26 Oct 2026, 02:53 UTC
Bioregistry mappings, dependencies & reusebioregistry.io26 Oct 2026, 02:53 UTC
Crossref citations (doi:10.1093/bioinformatics/btq099)api.crossref.org26 Oct 2026, 02:53 UTC

Run 2026-10-26T02-37-38Z · evaluator v2.0.0 · rubric v3.4 · entry.json · run snapshot

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