H2KG Ontology
EMMO-aligned ontology for hydrogen electrochemical systems, experiments, materials, measurements, and FAIR metadata
Ontology releaseThis page captures the compact shared H2KG schema subset: ontology header, schema classes, and schema properties. It is useful as a concise architectural reference, but it is not the resolver target for the full H2KG namespace.
Ontology IRI: https://w3id.org/h2kg/hydrogen-ontology
Namespace: https://w3id.org/h2kg/hydrogen-ontology#
Term count: 33
This page remains valuable for ontology engineering, governance, and lightweight schema browsing. The future resolver target for /h2kg/hydrogen-ontology should instead be the full namespace reference page.
Current state: documentation, machine artefacts, and resolver infrastructure are publicly established, and the full namespace reference page is the active resolver target.
1 terms
Ontology for representing proton exchange membrane fuel cell materials, components, devices, processes, measurements, and experiments.
13 terms
A class representing an agent that is responsible for carrying out a process, producing data, or contributing to the provenance of a resource in H2KG.
http://www.w3.org/ns/prov#Agenthttp://www.w3.org/ns/prov#Agent (Agent)A class representing data produced, used, or referenced by a process or measurement in H2KG.
http://www.w3.org/ns/prov#EntityA class representing a single data point that links a value to the property and measurement context it belongs to in H2KG.
http://www.w3.org/ns/prov#EntityA class representing an instrument used to perform, support, or control a measurement or manufacturing process in H2KG.
http://www.w3.org/ns/prov#EntityA class representing a manufacturing process that prepares, assembles, coats, or otherwise fabricates a material or device in H2KG.
A class representing a material entity that participates in a process, measurement, or device configuration in H2KG.
A class representing a measurement process that determines one or more properties of a material, device, or system in H2KG.
https://w3id.org/emmo/domain/electrochemistry#electrochemistry_7729c34e_1ae9_403d_b933_1765885e7f29 (Electrochemical measurement)A class representing metadata used to describe the provenance, identity, structure, or context of another resource in H2KG.
https://purls.helmholtz-metadaten.de/hob/HDO_00000029 (Metadaten)https://purls.helmholtz-metadaten.de/hob/HDO_00001036 (Metadatenschema)A parameter specifying normalization basis.
A class representing a parameter specified as an input, setting, or condition for a process or measurement in H2KG.
A class representing a process that transforms material, produces data, or changes the state of a system in H2KG.
http://www.w3.org/ns/prov#Activityhttps://w3id.org/emmo#EMMO_process (Process)A class representing a property that can be measured, computed, or otherwise assigned to a material, process, or system in H2KG.
https://w3id.org/emmo#EMMO_property (Property)A class representing a unit used to express the value of a quantity in H2KG.
18 terms
An object property relating a data point to the current-density value at which it is reported.
http://qudt.org/schema/qudt/QuantityValueAn object property relating a data point to the measurement from which it was generated.
An object property relating a process or measurement to data used as an input.
An object property relating a process or measurement to a material entity that serves as an input.
An object property relating a measurement or process to data generated as an output.
An object property relating a process to a material entity produced as an output.
An object property relating a process or measurement to a parameter that specifies one of its inputs, settings, or operating conditions.
An object property relating an entity or process to a constituent part.
An object property relating a measurement to a property that is determined, reported, or otherwise associated with that measurement.
An object property relating a parameter, property, or data point to the quantity value that expresses it.
http://qudt.org/schema/qudt/quantityValue (quantity value)An object property relating a process to a subprocess that forms part of its overall execution.
An object property relating an entity or process to a larger entity or process of which it forms a part.
An object property relating a subprocess to the larger process of which it forms a part.
An object property relating a measurement to a property that it determines.
An object property relating a property or result to the basis used for its normalization.
An object property relating a data point to the property represented by that data point.
An object property relating an electrochemical measurement setup or process to the reference electrode it uses.
https://w3id.org/emmo/domain/electrochemistry#electrochemistry_7729c34e_1ae9_403d_b933_1765885e7f29An object property relating a process or measurement to an instrument used to carry it out or support it.
1 terms
A datatype property relating a resource to a literal identifier used to distinguish or reference it.
http://www.w3.org/2000/01/rdf-schema#Literalhttp://purl.org/dc/terms/identifier (identifier)