H2KG Ontology
EMMO-aligned ontology for hydrogen electrochemical systems, experiments, materials, measurements, and FAIR metadata
Ontology releaseH2KG Application Ontology for Hydrogen Electrochemical Systems is an EMMO-aligned application ontology rather than a broad hydrogen-economy ontology.
Its primary scope is hydrogen electrochemical systems, including PEMFC and PEMWE experiments, materials, processes, measurements, data, and provenance.
The current release snapshot contains 32 schema terms and preserves the original h2kg identifiers by default.
CORE ontology IRI: https://w3id.org/h2kg/hydrogen-ontology
PEMFC ontology IRI: https://w3id.org/h2kg/pemfc/hydrogen-ontology
PEMWE ontology IRI: https://w3id.org/h2kg/pemwe/hydrogen-ontology
AIMWORKS remains the domain-specific release and documentation layer, while ODK is introduced as a nested standard ontology engineering and QC backend.
PEMFC and PEMWE profile modules remain AIMWORKS outputs in shadow mode, and ODK does not change public H2KG IRIs unless a later promotion step is explicitly approved.
Status: enabled
Primary artefact: base | Reasoner: ELK
ODK base artefact currently matches the curated schema and vocabulary baseline closely enough for shadow-mode review.
HDO is the primary alignment source for Helmholtz-community digital-data concepts such as metadata, identifiers, digital objects, schemas, and validation.
EMMO / ECHO remain the scientific and electrochemistry anchors, QUDT covers quantities and units, ChEBI covers chemistry, and PROV-O / DCTERMS remain publication metadata anchors.
Reviewed against HDO in the current run: 96
