The SSTIM vocabulary is published at w3id.org/sstim

The group’s vocabulary is published at https://w3id.org/sstim, a persistent
namespace that content-negotiates: ask it for RDF and it returns the namespace
catalogue in Turtle, JSON-LD or RDF/XML; ask it for HTML and it describes itself.
SSTIM is an OWL 2 ontology with a multilingual SKOS vocabulary, SHACL shapes and
four conformance profiles, covering stimulation techniques, stimuli and their
parameters, delivery media and body placements, exposure and safety boundaries,
session records, and the evidence assessments attached to claims about them. It is
published under CC BY 4.0, with frozen releases archived under the concept DOI
10.5281/zenodo.21286974. Reference
documentation, a knowledge browser and a SPARQL interface are at
https://w3c-cg.github.io/sstim/.

A consumer implements a profile rather than the whole graph. Kernel is the
dependency-free root for discovery, Core describes a stimulus and its channel,
Core Plus adds the shared controlled values, and Full carries evidence, sessions
and the ecosystem layer. Each profile entry point dereferences, and the
machine-readable bill of materials is the suite manifest at
https://w3id.org/sstim/manifest.

Terms are mapped conservatively to Wikidata, MeSH, UBERON and SNOMED CT. Every
identifier is verified at the authority that mints it before it enters the graph
and re-verified continuously, and where an external concept is broader or
narrower the mapping says so rather than defaulting to a close match. Each mapping
carries an annotated axiom naming its source, its verification date and the reason
for its predicate.

The group’s first draft report, SSTIM: a vocabulary for sensory stimulation, is published alongside the vocabulary and covers the scope, the module and profile structure, what conformance to a profile means, and how the external mappings are verified: https://w3c-cg.github.io/sstim/reports/vocabulary/

Review is welcome, particularly of the scope boundaries and the external mappings.
Issues and pull requests: https://github.com/w3c-cg/sstim