Ontology

SI

International System of Units Reference Point

Ontology, part of the SI Reference Point, covering measurement units (SI base units and SI units with special names) and prefixes.

ontologysiunitunits
E39

FAIR 30/48

Version 1.0.0

Evaluated 26 Oct 2026

How scores work

Source & access

Homepagesi-digital-framework.org Repositorygithub.com DownloadCanonical file / PURL

Automated evaluation

F Findable FAIR1/12
  • Persistent identifier (F1)no PURL / w3id / DOI for the artefact0
  • Indexed in services (F4)1: Bioregistry+1
  • Citable reference (F2)no reference publication listed0
A Accessible FAIR12/12
  • Homepage reachableHTTP 200+3
  • Artefact retrievable over HTTP(S) (A1)download HTTP 200+6
  • Metadata persists in a registry (A2)Bioregistry+3
I Interoperable FAIR8/12
  • Formal machine-readable format (I1)OWL+5
  • Semantic-web IRIs (I2)OWL+3
  • References other vocabularies (I3)no imported vocabularies found0
R Reusable FAIR9/12
  • Clear license (R1.1)CC-BY-3.0-IGO+5
  • Release provenance (R1.2)1.0.0 (version IRI in the artefact)+4
  • Community standards (R1.3)no independent compliance report (not on the OBO Dashboard)0
Q Ontology consistency & quality0/20
  • 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
M Maintenance8/16
  • Recency2026-06-11 → 4.5 months (≤ 6 months)+8
  • Release cadence (12 months)0 releases0
U Community adoption1/16
  • Documented adopting projects0 projects0
  • Reused by other ontologies00
  • Community signalmax(stars 20 → 1, citations 0 → 0)+1
P Penalties (inactivity & inconsistency)0
  • Time since last activity0.4 years → 4 × max(0, 0.4 − 1)0
  • Inactive statusnot archived, legacy or inactive0
  • Consistencynot yet checked by a reasoner0

FAIR subtotal 30/48 · earned 39/100 = 39/100 → grade E

Community adoption 0

No adopting projects documented yet.

Know a project that uses SI? 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 UTC39 E301.0.0—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”.

FactSourceRetrieved
Homepage link check (HTTP 200)si-digital-framework.org26 Oct 2026, 03:21 UTC
Repository link check (HTTP 200)github.com26 Oct 2026, 03:21 UTC
Download link check (HTTP 200)github.com26 Oct 2026, 03:21 UTC
Artefact header (version IRI)raw.githubusercontent.com26 Oct 2026, 03:21 UTC
Git refs (commit 9fbe531, latest tag v1.0b)github.com26 Oct 2026, 03:21 UTC
GitHub repository statisticsapi.github.com26 Oct 2026, 03:21 UTC
Bioregistry mappings, dependencies & reusebioregistry.io26 Oct 2026, 03:21 UTC

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