Ontology
SSN
Semantic Sensor Network Ontology
This ontology describes sensors, actuators and observations, and related concepts. It does not describe domain concepts, time, locations, etc. these are intended to be included from other ontologies via OWL imports.
Source & access
- homepage w3.org HTTP 200
- repository github.com HTTP 200
- download w3.org HTTP 200
Portals & registries
| Source | ID | Version | Classes | Properties | Individuals | Loaded |
|---|---|---|---|---|---|---|
| TIB Terminology Service | ssn | New modular version of the SSN ontology. This ontology was originally developed in 2009-2011 by the W3C Semantic Sensor Networks Incubator Group (SSN-XG). For more information on the group's activities see: http://www.w3.org/2005/Incubator/ssn/. The ontology was revised and modularized in 2015-2017 by the W3C/OGC Spatial Data on the Web Working Group, see: https://www.w3.org/2015/spatial/wiki/Semantic_Sensor_Network_Ontology. In particular, (a) the scope is extended to include actuation and sampling; (b) the core concepts and properties are factored out into the SOSA ontology. The SSN ontology imports SOSA and adds formal axiomatization consistent with the text definitions in SOSA, and adds classes and properties to accommodate the scope of the original SSN ontology. | 22 | 57 | 2 | 2 Feb 2023 |
Also registered as
aberowl: SSN agroportal: SSN bioportal: SSN fairsharing: FAIRsharing.c0bvcy tib.ts: ssn
Automated evaluation
F Findable FAIR8/12
- Persistent identifier (F1)no PURL / w3id / DOI for the artefact0
- Indexed in services (F4)4: TIB, BioPortal, Bioregistry, FAIRsharing+5
- Citable reference (F2)doi:10.3233/sw-180320+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 FAIR8/12
- Formal machine-readable format (I1)OWL, Turtle+5
- Semantic-web IRIs (I2)OWL, Turtle+3
- References other vocabularies (I3)no imported vocabularies found0
R Reusable FAIR2/12
- Clear license (R1.1)http://www.w3.org/Consortium/Legal/2015/copyright-software-and-document (not a recognised open license)+2
- 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 Maintenance10/16
- Recency2026-10-23 → 0.1 months (≤ 3 months)+10
- Release cadence (12 months)0 releases0
U Community adoption4/16
- Documented adopting projects0 projects0
- Reused by other ontologies00
- Community signalmax(stars 19 → 1, citations 476 → 4)+4
P Penalties (inactivity & inconsistency)0
- Time since last activity0.0 years → 4 × max(0, 0.0 − 1)0
- Inactive statusnot archived, legacy or inactive0
- Consistencynot yet checked by a reasoner0
FAIR subtotal 30/48 · earned 44/100 = 44/100 → grade D
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 | 44 D | 30 | commit c440a85 | — | 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) | w3.org | 26 Oct 2026, 03:23 UTC |
| Repository link check (HTTP 200) | github.com | 26 Oct 2026, 03:23 UTC |
| Download link check (HTTP 200) | w3.org | 26 Oct 2026, 03:23 UTC |
| Artefact header | w3.org | 26 Oct 2026, 03:23 UTC |
| Git refs (commit c440a85) | github.com | 26 Oct 2026, 03:23 UTC |
| GitHub repository statistics | api.github.com | 26 Oct 2026, 03:23 UTC |
| TIB Terminology Service metrics | service.tib.eu | 26 Oct 2026, 03:23 UTC |
| Bioregistry mappings, dependencies & reuse | bioregistry.io | 26 Oct 2026, 03:23 UTC |
| Crossref citations (doi:10.3233/sw-180320) | api.crossref.org | 26 Oct 2026, 03:23 UTC |
| Crossref citations (doi:10.1016/j.websem.2018.06.003) | api.crossref.org | 26 Oct 2026, 03:22 UTC |
Run 2026-10-26T02-37-38Z · evaluator v2.0.0 · rubric v3.4 · entry.json · run snapshot
How to cite
- The Modular SSN Ontology: A Joint W3C and OGC Standard Specifying the Semantics of Sensors, Observations, Sampling, and Actuation (2019) · doi:10.3233/sw-180320 · 204 citations
- SOSA: A lightweight ontology for sensors, observations, samples, and actuators (2018) · doi:10.1016/j.websem.2018.06.003 · 476 citations