Ontology

VT

Vertebrate trait ontology

The Vertebrate Trait Ontology is a controlled vocabulary for the description of traits (measurable or observable characteristics) pertaining to the morphology, physiology, or development of vertebrate organisms.

animal physiologybiologydevelopmental biologymorphologyoboontologyphenotypephysiology
B73

FAIR 46/48

Version 2026-10-02

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)vt2026-10-024,14626025 Oct 2026
OBO Dashboardvt2026-09-094,133——16 Sept 2026

Ontology IRI http://purl.obolibrary.org/obo/vt.owl
Version IRI http://purl.obolibrary.org/obo/vt/releases/2026-10-02/vt.owl

Languages en

Imports from (1)
IAO

Reused by (3)
SCDO BCGO GENEPIO

Logical consistency
consistent · 0 unsatisfiable
OWL 2 DL
no
ROBOT report
2 errors · 4 warnings · 1 info
OBO principles
FP01FP02FP03FP04FP05FP06FP07FP08FP09FP11FP12FP16FP20
Axioms
36,884 · 0.65% entities reused

Also registered as
aberowl: VT agroportal: VT biodivportal: VT bioportal: VT fairsharing: FAIRsharing.10gr18 obofoundry: vt ols: vt ontobee: VT wikidata.entity: Q81661831

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:10.1186/2041-1480-4-13+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 FAIR10/12
  • Formal machine-readable format (I1)OWL, OBO+5
  • Semantic-web IRIs (I2)OWL, OBO+3
  • References other vocabularies (I3)imports 1: iao+2
R Reusable FAIR12/12
  • Clear license (R1.1)CC BY 4.0+5
  • Release provenance (R1.2)2026-10-02 (version IRI in the artefact)+4
  • Community standards (R1.3)OBO principles: 11/13 checks pass+3
Q Ontology consistency & quality11/20
  • Logical consistencyconsistent, 0 unsatisfiable classes (OBO Dashboard)+10
  • OWL 2 DL profileoutside OWL 2 DL0
  • Upper-ontology alignmentno BFO/COB/DOLCE import found0
  • Standard relations (RO)does not import the Relation Ontology0
  • ROBOT report: no errors2 errors0
  • ROBOT report: warning density4 warnings / 4133 classes = 0.00+1
  • Pitfall scan: no critical pitfallsno pitfall scan yet; ROBOT report has 2 errors0
M Maintenance12/16
  • Recency2026-10-09 → 0.5 months (≤ 3 months)+10
  • Release cadence (12 months)1 release (OLS version IRI)+2
U Community adoption7/16
  • Documented adopting projects3 projects+4
  • Reused by other ontologies3: scdo, bcgo, genepio+2
  • Community signalmax(stars 7 → 1, citations 47 → 1)+1
P Penalties (inactivity & inconsistency)-3
  • Time since last activity0.0 years → 4 × max(0, 0.0 − 1)0
  • Inactive statusnot archived, legacy or inactive0
  • Consistencyconsistent, no unsatisfiable classes0
  • ROBOT report errors2 errors-3

FAIR subtotal 46/48 · earned 76/100 − 3 inactivity = 73/100 → grade B

Community adoption 3

  • animalgenome.org

    The Animal Quantitative Trait Loci (QTL) Database (Animal QTLdb) annotates trait mapping data for livestock animals using the VTO

    Source: OBO Foundry registry
  • rgd.mcw.edu

    The Rat Genome Database (RGD) uses the VTO to annotate rat QTL

    Source: OBO Foundry registry
  • phenome.jax.org

    The Mouse Phenome Database (MPD) uses the VTO to annotate mouse strain traits

    Source: OBO Foundry registry

Know a project that uses VT? 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 UTC73 B462026-10-024,146JSON

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, 03:29 UTC
Repository link check (HTTP 200)github.com26 Oct 2026, 03:29 UTC
Download link check (HTTP 200)purl.obolibrary.org26 Oct 2026, 03:29 UTC
Artefact header (version IRI)raw.githubusercontent.com26 Oct 2026, 03:29 UTC
Git refs (commit 2657dd8, latest tag 10.3)github.com26 Oct 2026, 03:29 UTC
GitHub repository statisticsapi.github.com26 Oct 2026, 03:29 UTC
OLS classes, imports, version & releaseebi.ac.uk26 Oct 2026, 03:29 UTC
OBO Foundry status, license & usagesobofoundry.org26 Oct 2026, 02:37 UTC
Bioregistry mappings, dependencies & reusebioregistry.io26 Oct 2026, 03:29 UTC
OBO Dashboard (checked 16 Sept 2026)dashboard.obofoundry.org26 Oct 2026, 02:37 UTC
Crossref citations (doi:10.1186/2041-1480-4-13)api.crossref.org26 Oct 2026, 03:29 UTC

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

How to cite