Ontology

ExO

Exposure ontology

ExO is intended to bridge the gap between exposure science and diverse environmental health disciplines including toxicology, epidemiology, disease surveillance, and epigenetics.

diseaseenvironmental scienceepigeneticsexposureoboontologytoxicology
C65

FAIR 47/48

Version 2025-08-29

Evaluated 26 Oct 2026

How scores work

Source & access

Homepagegithub.com DownloadCanonical file / PURL Browse in OLSEMBL-EBI Ontology Lookup ServiceBrowse in BioPortalNCBO BioPortalBrowse in OBO FoundryOBO Foundry registry

Portals & registries

SourceIDVersionClassesPropertiesIndividualsLoaded
OLS (EMBL-EBI)exo2025-08-2916827025 Oct 2026
OBO Dashboardexo2025-08-29165——9 Dec 2025

Ontology IRI http://purl.obolibrary.org/obo/exo.owl
Version IRI http://purl.obolibrary.org/obo/exo/releases/2025-08-29/exo.owl

Languages en

Imports from (3)
BFO IAO RO

Reused by (10)
ECTO GENEPIO SCDO SLSO ADO COHO DISDRIV DOID OHD VALUESETS

Logical consistency
consistent · 0 unsatisfiable
OWL 2 DL
no
ROBOT report
6 errors · 3 warnings · 2 info
OBO principles
FP01FP02FP03FP04FP05FP06FP07FP08FP09FP11FP12FP16FP20
Axioms
1,513 · 15.46% entities reused

Also registered as
aberowl: EXO bioportal: EXO fairsharing: FAIRsharing.6hna78 obofoundry: exo ols: exo ontobee: ExO wikidata.entity: Q113012658

Automated evaluation

F Findable FAIR12/12
  • Persistent identifier (F1)purl.obolibrary.org+4
  • Indexed in services (F4)5: OLS, BioPortal, OBO Foundry, Bioregistry, FAIRsharing+5
  • Citable reference (F2)doi:10.1021/es2033857+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)OBO Foundry, 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 3: bfo, iao, ro+4
R Reusable FAIR11/12
  • Clear license (R1.1)CC BY 4.0+5
  • Release provenance (R1.2)2025-08-29 (version IRI in the artefact)+4
  • Community standards (R1.3)OBO principles: 10/13 checks pass+2
Q Ontology consistency & quality15/20
  • Logical consistencyconsistent, 0 unsatisfiable classes (OBO Dashboard)+10
  • OWL 2 DL profileoutside OWL 2 DL0
  • Upper-ontology alignmentimports BFO+3
  • Standard relations (RO)imports RO+1
  • ROBOT report: no errors6 errors0
  • ROBOT report: warning density3 warnings / 165 classes = 0.02+1
  • Pitfall scan: no critical pitfallsno pitfall scan yet; ROBOT report has 6 errors0
M Maintenance2/16
  • Recency2025-09-04 → 13.7 months (≤ 2 years)+2
  • Release cadence (12 months)0 releases (GitHub releases)0
U Community adoption5/16
  • Documented adopting projects0 projects0
  • Reused by other ontologies10: ecto, genepio, scdo, slso, ado, coho…+3
  • Community signalmax(stars 3 → 0, citations 58 → 2)+2
P Penalties (inactivity & inconsistency)-4
  • Time since last activity1.1 years → 4 × max(0, 1.1 − 1)-1
  • Inactive statusnot archived, legacy or inactive0
  • Consistencyconsistent, no unsatisfiable classes0
  • ROBOT report errors6 errors-3

FAIR subtotal 47/48 · earned 69/100 − 4 inactivity = 65/100 → grade C

Community adoption 0

No adopting projects documented yet.

Know a project that uses ExO? 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 UTC65 C472025-08-29168JSON

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)github.com26 Oct 2026, 02:55 UTC
Repository link check (HTTP 200)github.com26 Oct 2026, 02:55 UTC
Download link check (HTTP 200)purl.obolibrary.org26 Oct 2026, 02:55 UTC
Artefact header (version IRI)raw.githubusercontent.com26 Oct 2026, 02:55 UTC
Git refs (commit aae5051, latest tag v2025-08-29)github.com26 Oct 2026, 02:55 UTC
GitHub repository statisticsapi.github.com26 Oct 2026, 02:55 UTC
OLS classes, imports, version & releaseebi.ac.uk26 Oct 2026, 02:55 UTC
OBO Foundry status, license & usagesobofoundry.org26 Oct 2026, 02:37 UTC
Bioregistry mappings, dependencies & reusebioregistry.io26 Oct 2026, 02:55 UTC
OBO Dashboard (checked 9 Dec 2025)dashboard.obofoundry.org26 Oct 2026, 02:37 UTC
Crossref citations (doi:10.1021/es2033857)api.crossref.org26 Oct 2026, 02:55 UTC

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

How to cite