Vocabulary
UCUM
Unified Code for Units of Measure
Unified Code for Units of Measure (UCUM) is a code system intended to include all units of measures being contemporarily used in international science, engineering, and business.
Source & access
- homepage ucum.org HTTP 200
- repository github.com HTTP 200
- download lov.linkeddata.es HTTP fetch failed
Portals & registries
Also registered as
fairsharing: FAIRsharing.27w8k0 wikidata.entity: Q2494286
Automated evaluation
- Persistent identifier (F1)no PURL / w3id / DOI for the artefact0
- Indexed in services (F4)2: Bioregistry, FAIRsharing+3
- Citable reference (F2)doi:10.1136/jamia.1999.0060151+3
- Homepage reachableHTTP 200+3
- Artefact retrievable over HTTP(S) (A1)only the source repository is reachable (no direct download)+3
- Metadata persists in a registry (A2)Bioregistry+3
- Formal machine-readable format (I1)RDF+5
- Semantic-web IRIs (I2)RDF+3
- References other vocabularies (I3)no imported vocabularies found0
- Clear license (R1.1)none found0
- Release provenance (R1.2)v2.2 (latest GitHub release); not declared inside the artefact+2
- Community standards (R1.3)no independent compliance report (not on the OBO Dashboard)0
- Logical consistencynever checked by a reasoner0
- OWL 2 DL profileprofile not checked0
- Upper-ontology alignmentno BFO/COB/DOLCE import found0
- Standard relations (RO)does not import the Relation Ontology0
- ROBOT report: no errorsno ROBOT report available0
- ROBOT report: warning densityno ROBOT report available0
- Pitfall scan: no critical pitfallsno pitfall scan or ROBOT report yet0
- Recency2025-07-09 → 15.6 months (≤ 2 years)+2
- Release cadence (12 months)0 releases (GitHub releases)0
- Documented adopting projects0 projects0
- Reused by other ontologies2 vocabularies (LOV)+1
- Community signalmax(stars 111 → 4, citations 35 → 1)+4
- Time since last activity1.3 years → 4 × max(0, 1.3 − 1)-1
- Inactive statusnot archived, legacy or inactive0
- Consistencynot yet checked by a reasoner0
FAIR subtotal 25/48 · earned 32/100 − 1 inactivity = 31/100 → grade E
Community adoption 0
No adopting projects documented yet.
Know a project that uses UCUM? 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 | 31 E | 25 | v2.2 | — | 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) | ucum.org | 26 Oct 2026, 03:27 UTC |
| Repository link check (HTTP 200) | github.com | 26 Oct 2026, 03:27 UTC |
| Download link check (HTTP fetch failed) | lov.linkeddata.es | 26 Oct 2026, 03:27 UTC |
| Git refs (commit ef4c31c, latest tag v2.2) | github.com | 26 Oct 2026, 03:27 UTC |
| GitHub repository statistics | api.github.com | 26 Oct 2026, 03:27 UTC |
| Bioregistry mappings, dependencies & reuse | bioregistry.io | 26 Oct 2026, 03:27 UTC |
| Crossref citations (doi:10.1136/jamia.1999.0060151) | api.crossref.org | 26 Oct 2026, 03:27 UTC |
Run 2026-10-26T02-37-38Z · evaluator v2.0.0 · rubric v3.4 · entry.json · run snapshot
How to cite
- Units of measure in clinical information systems (1999) · doi:10.1136/jamia.1999.0060151 · 35 citations