Ontology

UNIMOD

Unimod protein modification database for mass spectrometry

Unimod is a public domain database created to provide a community supported, comprehensive database of protein modifications for mass spectrometry applications. That is, accurate and verifiable values, derived from elemental compositions, for the mass differences introduced by all types of natural and artificial modifications.

bioinformaticsmass spectrometry assaymass spectrumontologyproteinprotein modification process

E28

FAIR 29/48

Evaluated 26 Oct 2026

How scores work

Source & access

Homepageunimod.org DownloadCanonical file / PURL Browse in OLSEMBL-EBI Ontology Lookup Service

homepage unimod.org HTTP 200
download raw.githubusercontent.com HTTP 200

Portals & registries

Source	ID	Version	Classes	Properties	Individuals	Loaded
OLS (EMBL-EBI)	`unimod`	—	1,523	11	0	25 Oct 2026

Ontology IRI http://purl.obolibrary.org/obo/TEMP

Languages en

Imports from (1)
IAO

Also registered as
fairsharing: FAIRsharing.zZHCUQ ols: unimod

Automated evaluation

F Findable FAIR7/12

Persistent identifier (F1)no PURL / w3id / DOI for the artefact0
Indexed in services (F4)3: OLS, Bioregistry, FAIRsharing+4
Citable reference (F2)doi:10.1002/pmic.200300744+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)Bioregistry+3

I Interoperable FAIR10/12

Formal machine-readable format (I1)OWL+5
Semantic-web IRIs (I2)OWL+3
References other vocabularies (I3)imports 1: iao+2

R Reusable FAIR0/12

Clear license (R1.1)none found0
Release provenance (R1.2)no version in artefact, registry or release tags0
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 Maintenance0/16

Recencyno activity evidence0
Release cadence (12 months)0 releases0

U Community adoption4/16

Documented adopting projects0 projects0
Reused by other ontologies00
Community signalmax(stars 0 → 0, citations 362 → 4)+4

P Penalties (inactivity & inconsistency)-5

No activity evidenceno commits, releases or dated files found-5
Inactive statusnot archived, legacy or inactive0
Consistencynot yet checked by a reasoner0

FAIR subtotal 29/48 · earned 33/100 − 5 inactivity = 28/100 → grade E

Community adoption 0

No adopting projects documented yet.

Know a project that uses UNIMOD? 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	28 E	29	—	1,523	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)	unimod.org	26 Oct 2026, 03:27 UTC
Download link check (HTTP 200)	raw.githubusercontent.com	26 Oct 2026, 03:27 UTC
Artefact header	raw.githubusercontent.com	26 Oct 2026, 03:27 UTC
OLS classes, imports, version & release	ebi.ac.uk	26 Oct 2026, 03:27 UTC
Bioregistry mappings, dependencies & reuse	bioregistry.io	26 Oct 2026, 03:27 UTC
Crossref citations (doi:10.1002/pmic.200300744)	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

Unimod: Protein modifications for mass spectrometry (2004) · doi:10.1002/pmic.200300744 · 362 citations