Ontology

SO

Sequence types and features ontology

The Sequence Ontology (SO) is a structured controlled vocabulary for the parts of a genomic annotation. It provides a common set of terms and definitions to facilitate the exchange, analysis and management of genomic data.

bioinformaticsbiologydeoxyribonucleic aciddnagenegenomegenomicslife science
C69

FAIR 45/48

Version 2026-08-07

Evaluated 26 Oct 2026

How scores work

Source & access

Homepagesequenceontology.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)so2026-08-072,75292025 Oct 2026
OBO Dashboardso2026-08-072,655——16 Sept 2026

Ontology IRI http://purl.obolibrary.org/obo/so.owl
Version IRI http://purl.obolibrary.org/obo/so/2026-08-07/so.owl

Languages en

Imports from (1)
IAO

Reused by (61)
DOID FYPO GENEPIO GENO MONDO MRO NCRO NGBO OBA OBI PCL ADO AISM BCGO BCO BMONT CARO CCF CIDO CL CPONT ECAO ECO ECOCORE EFO EUPATH FBbt FLOPO FOVT GO MIXS HCAO HGNC hgnc.genegroup HRA ICO MAXO MP MSIO OBCS OBIB OGSF OHMI OMIT ONE ONS OPMI ORNASEQ ORTH PATO PHIPO PR PREFER PRIDE PSDO RBO SLSO STATO UBERON VALUESETS XPO

Logical consistency
consistent · 0 unsatisfiable
OWL 2 DL
no
ROBOT report
70 errors · 319 warnings · 8 info
OBO principles
FP01FP02FP03FP04FP05FP06FP07FP08FP09FP11FP12FP16FP20
Axioms
25,420 · 1.13% entities reused

Also registered as
aberowl: SO agroportal: SO bioportal: SO fairsharing: FAIRsharing.6bc7h9 obofoundry: so ols: so ontobee: SO wikidata.entity: Q81661803

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/gb-2010-11-8-r88+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 FAIR11/12
  • Clear license (R1.1)CC BY 4.0+5
  • Release provenance (R1.2)2026-08-07 (version IRI in the artefact)+4
  • Community standards (R1.3)OBO principles: 7/13 checks pass+2
Q Ontology consistency & quality10/20
  • 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 errors70 errors0
  • ROBOT report: warning density319 warnings / 2655 classes = 0.120
  • Pitfall scan: no critical pitfallsno pitfall scan yet; ROBOT report has 70 errors0
M Maintenance12/16
  • Recency2026-08-07 → 2.6 months (≤ 3 months)+10
  • Release cadence (12 months)1 release (GitHub releases)+2
U Community adoption8/16
  • Documented adopting projects0 projects0
  • Reused by other ontologies61: doid, fypo, genepio, geno, mondo, mro…+4
  • Community signalmax(stars 106 → 4, citations 73 → 2)+4
P Penalties (inactivity & inconsistency)-6
  • Time since last activity0.2 years → 4 × max(0, 0.2 − 1)0
  • Inactive statusnot archived, legacy or inactive0
  • Consistencyconsistent, no unsatisfiable classes0
  • ROBOT report errors70 errors-6

FAIR subtotal 45/48 · earned 75/100 − 6 inactivity = 69/100 → grade C

Community adoption 0

No adopting projects documented yet.

Know a project that uses SO? 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 UTC69 C452026-08-072,752JSON

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)sequenceontology.org26 Oct 2026, 03:22 UTC
Repository link check (HTTP 200)github.com26 Oct 2026, 03:22 UTC
Download link check (HTTP 200)purl.obolibrary.org26 Oct 2026, 03:22 UTC
Artefact header (version IRI)raw.githubusercontent.com26 Oct 2026, 03:22 UTC
Git refs (commit 4340c14, latest tag v3.1)github.com26 Oct 2026, 02:41 UTC
GitHub repository statisticsapi.github.com26 Oct 2026, 02:41 UTC
OLS classes, imports, version & releaseebi.ac.uk26 Oct 2026, 03:22 UTC
OBO Foundry status, license & usagesobofoundry.org26 Oct 2026, 02:37 UTC
Bioregistry mappings, dependencies & reusebioregistry.io26 Oct 2026, 03:22 UTC
OBO Dashboard (checked 16 Sept 2026)dashboard.obofoundry.org26 Oct 2026, 02:37 UTC
Crossref citations (doi:10.1186/gb-2010-11-8-r88)api.crossref.org26 Oct 2026, 03:22 UTC
Crossref citations (doi:10.1016/j.jbi.2010.03.002)api.crossref.org26 Oct 2026, 03:22 UTC

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

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