SSK-GAIN: A Cross-Domain Ontology and Entity Catalogue for Semiconductor Global Supply Chain Geopolitics

An OWL 2 ontology in four modules (core, international relations, supply chain, cross-domain bridge) with SHACL shapes, an instantiated and machine-validated entity catalogue (deposited pilot graph, 21,561 triples), and the validation toolkit that reproduces every check reported in the accompanying resource article. The bridge module contributes five cross-domain relations with constrained domains and ranges, one per transmission mechanism of coercion. Entities resolve across domains through shared, reified canonical identifiers (LEI, ISO 3166-1 alpha-3, Wikidata) under an inverse functional axiom that keeps identity inference within OWL 2 DL. Validation comprises eleven checks: OWL RL consistency reasoning, SHACL conformance, per-relation range probes, module-document integrity, and injection probes that prove the checks are not vacuous. An end-to-end worked case joins the Entity List designation of SMIC to a documented supply relation through a shared identifier individual. Version 0.1.10 excludes runtime artefacts (.venv, caches) from checksum verification, so installing dependencies inside the deposit root no longer fails the manifest check. Namespaces dereference via https://w3id.org/ssk-gain/. Records from sources whose licences forbid redistribution (ETO CC-BY-NC-4.0; UN Comtrade, United Nations copyright) are excluded; the schema, the field mappings, and the materialisation and validation stages are published, and the collection stage is documented per source, so users with their own access can rebuild the excluded records by implementing the documented collection and normalisation stage and running the released stages downstream.