Semantic Interoperability

# Semantic Interoperability **Entity class:** Concept or analytic term **Domain:** Information Systems / Ontology / Standards **Doc Type:** Canonical Technical Concept **Maturity:** Developed ## Definition **Semantic interoperability** is the ability of systems to exchange information while preserving sufficiently shared machine-readable meaning for the receiving system to use it correctly. It differs from syntactic interoperability. Two systems may parse the same message while assigning different identities, units, categories, time semantics or authority to its contents. ## Governing Variable Semantic interoperability governs meaning across boundaries: what an entity is, which relation holds, how a value is measured and what operational use is legitimate. ## Material and Computational Manifestation Ontologies, controlled vocabularies, identifiers, units, mappings, provenance and explicit context support semantic exchange. [[wiki/Knowledge Graph|Knowledge Graph]] structures can represent relations; [[wiki/Operational Ontology|Operational Ontology]] determines which meanings become actionable. ## Constitutional Question and Failure Modes The shared schema can erase local distinctions or transfer authority unintentionally. Meaning should travel with provenance, uncertainty, jurisdiction and use constraints rather than as a context-free value. ## Related Ontology [[wiki/Ontology|Ontology]] · [[wiki/Knowledge Graph|Knowledge Graph]] · [[wiki/Digital Twin Interoperability|Digital Twin Interoperability]] · [[wiki/Model-Space Sovereignty|Model-Space Sovereignty]]  ## A concrete criminal-justice exchange interface DHS’s historical LEIS briefing identifies GJXDM/NIEM data models, LEXS exchange formats, and message transformation as part of its interface to partner systems. NCTCOG LEAP appears on the same briefing’s existing-MOU list. This supplies a concrete case in which a legal sharing relationship is made usable through explicit representations and technical interfaces. Agreement, parsable message, correctly interpreted identity, and permitted action remain separate requirements. Source and handling context must survive exchange if an apparent match is to support an accurate decision. **Follow:** [[wiki/DHS Law Enforcement Information Sharing Service|DHS Law Enforcement Information Sharing Service]] · [[wiki/ICEPIC|ICEPIC]] · [[wiki/Interlocal Information Sharing|Interlocal Information Sharing]] **Source:** [[research/The Austin Surveillance Field|The Austin Surveillance Field]]; [DHS — Law Enforcement Information Sharing Service briefing, slides 4–16; existing MOUs on slide 15](https://info.publicintelligence.net/DHS-LEISS.pdf).  ## Relationships  This entry's documented connections are expressed in its definition and related-work routes, with provenance retained in the source-linked material.