Ontology

TO

Plant Trait Ontology

A controlled vocabulary to describe phenotypic traits in plants.

botanydataplantearth sciencesesslife cycleoboontologyphenotype
B82

FAIR 48/48

Version 2026-01-14

Evaluated 26 Oct 2026

How scores work

Source & access

Homepagebrowser.planteome.org Repositorygithub.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)to2026-01-146,194295925 Oct 2026
TIB Terminology Serviceto2025-05-205,334241921 May 2025
OBO Dashboardto2026-01-145,050——25 Feb 2026

Ontology IRI http://purl.obolibrary.org/obo/to.owl
Version IRI http://purl.obolibrary.org/obo/to/releases/2026-01-14/to.owl

Languages en

Imports from (11)
BFO CHEBI GO IAO NCBITaxon OBI OMO PATO PO RO UBERON

Reused by (3)
AGRO EFO PRIDE

Logical consistency
consistent · 0 unsatisfiable
OWL 2 DL
yes
ROBOT report
0 errors · 12 warnings · 0 info
OBO principles
FP01FP02FP03FP04FP05FP06FP07FP08FP09FP11FP12FP16FP20
Axioms
52,457 · 66.97% entities reused

Also registered as
aberowl: TO agroportal: TO biodivportal: TO bioportal: PTO fairsharing: FAIRsharing.w69t6r obofoundry: to ols: to ontobee: TO tib.ts: to wikidata.entity: Q81661818

Automated evaluation

F Findable FAIR12/12
  • Persistent identifier (F1)purl.obolibrary.org+4
  • Indexed in services (F4)6: OLS, TIB, BioPortal, OBO Foundry, Bioregistry, FAIRsharing+5
  • Citable reference (F2)doi:10.1093/nar/gkx1152+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 11: bfo, chebi, go, iao, ncbitaxon, obi, omo, pato…+4
R Reusable FAIR12/12
  • Clear license (R1.1)CC BY 4.0+5
  • Release provenance (R1.2)2026-01-14 (version IRI in the artefact)+4
  • Community standards (R1.3)OBO principles: 11/13 checks pass+3
Q Ontology consistency & quality20/20
  • Logical consistencyconsistent, 0 unsatisfiable classes (OBO Dashboard)+10
  • OWL 2 DL profilein OWL 2 DL+2
  • Upper-ontology alignmentimports BFO+3
  • Standard relations (RO)imports RO+1
  • ROBOT report: no errors0 errors+2
  • ROBOT report: warning density12 warnings / 5050 classes = 0.00+1
  • Pitfall scan: no critical pitfallsno pitfall scan yet; ROBOT report has 0 errors+1
M Maintenance8/16
  • Recency2026-04-22 → 6.1 months (≤ 1 year)+5
  • Release cadence (12 months)2 releases (GitHub releases)+3
U Community adoption6/16
  • Documented adopting projects2 projects+2
  • Reused by other ontologies3: agro, efo, pride+2
  • Community signalmax(stars 49 → 2, citations 164 → 2)+2
P Penalties (inactivity & inconsistency)0
  • Time since last activity0.5 years → 4 × max(0, 0.5 − 1)0
  • Inactive statusnot archived, legacy or inactive0
  • Consistencyconsistent, no unsatisfiable classes0

FAIR subtotal 48/48 · earned 82/100 = 82/100 → grade B

Community adoption 2

  • planteome.org

    Planteome uses TO to describe traits for genes and germplasm

    Source: OBO Foundry registry
  • gramene.org

    Gramene uses PO for the annotation of plant genes and QTLs

    Source: OBO Foundry registry

Know a project that uses TO? 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 UTC82 B482026-01-146,194JSON

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)browser.planteome.org26 Oct 2026, 03:26 UTC
Repository link check (HTTP 200)github.com26 Oct 2026, 03:26 UTC
Download link check (HTTP 200)purl.obolibrary.org26 Oct 2026, 03:26 UTC
Artefact header (version IRI)raw.githubusercontent.com26 Oct 2026, 03:26 UTC
Git refs (commit fef9591, latest tag v2026-01-14)github.com26 Oct 2026, 03:26 UTC
GitHub repository statisticsapi.github.com26 Oct 2026, 03:26 UTC
OLS classes, imports, version & releaseebi.ac.uk26 Oct 2026, 03:26 UTC
OBO Foundry status, license & usagesobofoundry.org26 Oct 2026, 02:37 UTC
TIB Terminology Service metricsservice.tib.eu26 Oct 2026, 03:26 UTC
Bioregistry mappings, dependencies & reusebioregistry.io26 Oct 2026, 03:26 UTC
OBO Dashboard (checked 25 Feb 2026)dashboard.obofoundry.org26 Oct 2026, 02:37 UTC
Crossref citations (doi:10.1093/nar/gkx1152)api.crossref.org26 Oct 2026, 03:14 UTC
Crossref citations (doi:10.1093/nar/gkad1028)api.crossref.org26 Oct 2026, 03:26 UTC

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

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