Ontology
RO
Relation Ontology
The OBO Relation Ontology provides consistent and unambiguous formal definitions of the relational expressions used in biomedical ontologies.
Source & access
- homepage oborel.github.io HTTP 200
- repository github.com HTTP 200
- download purl.obolibrary.org HTTP 200
Portals & registries
| Source | ID | Version | Classes | Properties | Individuals | Loaded |
|---|---|---|---|---|---|---|
| OLS (EMBL-EBI) | ro | 2026-09-04 | 58 | 836 | 91 | 25 Oct 2026 |
| TIB Terminology Service | ro | 2025-06-24 | 56 | 819 | 97 | 3 Jul 2025 |
| OBO Dashboard | ro | 2026-09-04 | 52 | — | — | 16 Sept 2026 |
Ontology IRI http://purl.obolibrary.org/obo/ro.owl
Version IRI http://purl.obolibrary.org/obo/ro/releases/2026-09-04/ro.owl
Languages en
Imports from (14)
BFO CHEBI CL COB ENVO GO IAO NCBITaxon OBI OGMS OMO PATO UBERON UPHENO
Reused by (196)
AGRO AISM AMPHX APOLLO_SV ARO BCO BSPO BTO CHMO CIDO CL CLAO CLO CLYH COB COLAO CTENO DDANAT DDPHENO DIDEO DOID DPO DRON ECAO ECOCORE ECTO EMAPA EMRO ENVO EXMO ExO FAO FBbt FBcv FBdv FLOPO FOODON FOVT FYPO GALLONT GECKO GENEPIO GENO GO GSSO HANCESTRO HAO HP HsapDv HSO HTN IAO ICEO ICO IDO INO LEPAO MAXO MCRO MmusDv MONDO MOP MP MPIO MRO NBO NCRO OAE OARCS OBA OBCS OBI OBIB OCCO OHD OHMI OHPI OlatDv OMIT OMP OMRSE ONS ONTOAVIDA ONTONEO OOSTT OPL OPMI ORNASEQ OVAE PAIN PATO PCL PCO PDRO PECO PHIPO PLANA PLANP PO PORO PPO PREFER PROCO PSDO PSO RBO SCDO SEPIO SLSO STATO TO TXPO UBERON UPHENO VO WBbt WBls WBPhenotype XAO XCO XPO ZECO ZFA ZFS ZP ADDICTO ADO AFO AfPO AIO BAO BCGO BCIO BMONT CARO CCF CCO CDNO CEPH CHEBI CHEMINF CHIRO CMPO COHO COVOC CPONT CRO DISDRIV DUO EC ECO EFO EHDAA2 ENM EPIO EUPATH FBbi FIDEO GEOGEO GEXO GMHO HCAO HGNC hgnc.genegroup HRA IDOCOVID19 LABO MCO MFMO MICRO MS MSIO NGBO OGSF OMIABIS ONE ORPHA ORTH PBPKO PdumDv PR PRIDE REHABO RETO REXO ROR SIBO SLM SWO T4FS TAO UPA VALUESETS VBO VSAO WIKIPATHWAYS
- Logical consistency
- consistent · 0 unsatisfiable
- OWL 2 DL
- yes
- ROBOT report
- 0 errors · 144 warnings · 263 info
- OBO principles
- FP01FP02FP03FP04FP05FP06FP07FP08FP09FP11FP12FP16FP20
- Axioms
- 6,426 · 12.39% entities reused
OOPS!: 1 critical · 1 important · 2 minor pitfall types
Also registered as
aberowl: RO agroportal: RO biodivportal: RO fairsharing: FAIRsharing.9w8ea0 obofoundry: ro ols: ro ontobee: RO tib.ts: ro wikidata.entity: Q28729320
Automated evaluation
- Persistent identifier (F1)purl.obolibrary.org+4
- Indexed in services (F4)5: OLS, TIB, OBO Foundry, Bioregistry, FAIRsharing+5
- Citable reference (F2)doi:10.1186/2041-1480-5-41+3
- Homepage reachableHTTP 200+3
- Artefact retrievable over HTTP(S) (A1)download HTTP 200+6
- Metadata persists in a registry (A2)OBO Foundry, Bioregistry+3
- Formal machine-readable format (I1)OWL, OBO+5
- Semantic-web IRIs (I2)OWL, OBO+3
- References other vocabularies (I3)imports 14: bfo, chebi, cl, cob, envo, go, iao, ncbitaxon…+4
- Clear license (R1.1)CC0 1.0+5
- Release provenance (R1.2)2026-09-04 (version IRI in the artefact)+4
- Community standards (R1.3)OBO principles: 12/13 checks pass+3
- Logical consistencyconsistent, 0 unsatisfiable classes (OBO Dashboard)+10
- OWL 2 DL profilein OWL 2 DL+2
- Upper-ontology alignmentimports BFO, COB+3
- Standard relations (RO)does not import the Relation Ontology0
- ROBOT report: no errors0 errors+2
- ROBOT report: warning density144 warnings / 52 classes = 2.770
- Pitfall scan: no critical pitfalls1 critical, 1 important, 2 minor pitfall types (SchemaScope Python scan (OOPS! pitfall subset))0
- Recency2026-10-05 → 0.7 months (≤ 3 months)+10
- Release cadence (12 months)3 releases (GitHub releases)+3
- Documented adopting projects1 project+2
- Reused by other ontologies196: agro, aism, amphx, apollo_sv, aro, bco…+4
- Community signalmax(stars 113 → 4, citations 662 → 4)+4
- Time since last activity0.1 years → 4 × max(0, 0.1 − 1)0
- Inactive statusnot archived, legacy or inactive0
- Consistencyconsistent, no unsatisfiable classes0
- Critical pitfalls1 critical pitfall type (P19) × 3-3
FAIR subtotal 48/48 · earned 88/100 − 3 inactivity = 85/100 → grade A
Community adoption 1
- geneontology.org
RO is used for annotation extensions in the GO and GO Causal Activity Models.
Source: OBO Foundry registry
Know a project that uses RO? Suggest it.
History & changes 1 run
History starts with the first archived run; changes appear after the next evaluation.
| Run | Score | FAIR | Version evaluated | Terms | Snapshot |
|---|---|---|---|---|---|
| 26 Oct 2026, 03:31 UTC | 85 A | 48 | 2026-09-04 | 58 | JSON |
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”.
| Fact | Source | Retrieved |
|---|---|---|
| Homepage link check (HTTP 200) | oborel.github.io | 26 Oct 2026, 03:19 UTC |
| Repository link check (HTTP 200) | github.com | 26 Oct 2026, 03:19 UTC |
| Download link check (HTTP 200) | purl.obolibrary.org | 26 Oct 2026, 03:19 UTC |
| Artefact header (version IRI) | raw.githubusercontent.com | 26 Oct 2026, 03:17 UTC |
| Git refs (commit 1763bae, latest tag v2026-09-04) | github.com | 26 Oct 2026, 03:17 UTC |
| GitHub repository statistics | api.github.com | 26 Oct 2026, 03:17 UTC |
| OLS classes, imports, version & release | ebi.ac.uk | 26 Oct 2026, 03:09 UTC |
| OBO Foundry status, license & usages | obofoundry.org | 26 Oct 2026, 02:37 UTC |
| TIB Terminology Service metrics | service.tib.eu | 26 Oct 2026, 03:09 UTC |
| Bioregistry mappings, dependencies & reuse | bioregistry.io | 26 Oct 2026, 03:19 UTC |
| OBO Dashboard (checked 16 Sept 2026) | dashboard.obofoundry.org | 26 Oct 2026, 02:37 UTC |
| OOPS! pitfall scan | oops.linkeddata.es | 25 Oct 2026, 21:53 UTC |
| Crossref citations (doi:10.1186/2041-1480-5-41) | api.crossref.org | 26 Oct 2026, 03:19 UTC |
| Crossref citations (doi:10.1186/gb-2005-6-5-r46) | api.crossref.org | 26 Oct 2026, 03:19 UTC |
Run 2026-10-26T02-37-38Z · evaluator v2.0.0 · rubric v3.4 · entry.json · run snapshot
How to cite
- Structuring research methods and data with the research object model: genomics workflows as a case study (2014) · doi:10.1186/2041-1480-5-41 · 22 citations
- Relations in biomedical ontologies (2005) · doi:10.1186/gb-2005-6-5-r46 · 662 citations