Vocabulary

NCO

NEPOMUK Contact Ontology

NEPOMUK Contact Ontology describes contact information, common in many places on the desktop. It evolved from the VCARD specification (RFC 2426) and has been inspired by the Vcard Ontology by Renato Ianella. The scope of NCO is much broader though. This document gives an overview of the classes, properties and intended use cases of the NCO ontology.

ssdesk

FAIR 11/48

Evaluated 26 Oct 2026

How scores work

Source & access

Homepagesemanticdesktop.org DownloadCanonical file / PURL

homepage semanticdesktop.org HTTP 200
download lov.linkeddata.es HTTP fetch failed

Automated evaluation

F Findable FAIR0/12

Persistent identifier (F1)no PURL / w3id / DOI for the artefact0
Indexed in services (F4)not indexed anywhere0
Citable reference (F2)no reference publication listed0

A Accessible FAIR3/12

Homepage reachableHTTP 200+3
Artefact retrievable over HTTP(S) (A1)unreachable0
Metadata persists in a registry (A2)not in Bioregistry or OBO Foundry0

I Interoperable FAIR8/12

Formal machine-readable format (I1)RDF+5
Semantic-web IRIs (I2)RDF+3
References other vocabularies (I3)no imported vocabularies found0

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 adoption0/16

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

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 11/48 · earned 11/100 − 5 inactivity = 6/100 → grade E

Community adoption 0

No adopting projects documented yet.

Know a project that uses NCO? 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	6 E	11	—	—	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)	semanticdesktop.org	26 Oct 2026, 03:07 UTC
Download link check (HTTP fetch failed)	lov.linkeddata.es	26 Oct 2026, 03:07 UTC

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