@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix prov: <http://www.w3.org/ns/prov#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix matsci: <https://w3id.org/matsci-sam/metadata#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell> a skos:Concept ;
  skos:inScheme <https://w3id.org/matsci-sam/vocabulary/id4> ;
  skos:prefLabel "fuel cell"@en ;
  matsci:canonicalDefinition <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/1> ;
  skos:definition <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/1/revisions/1> ;
  skos:definition <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/2/revisions/1> ;
  skos:definition <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/3/revisions/1> ;
  dcterms:contributor "Colton Gerber" ;
  dcterms:contributor "gemma3" ;
  dcterms:contributor "Christopher Rauch" ;
  dcterms:created "2025-07-30"^^xsd:date .

<https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/1> a matsci:Definition ;
  dcterms:isPartOf <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell> ;
  matsci:definitionNumber "1"^^xsd:positiveInteger ;
  matsci:currentRevision <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/1/revisions/1> ;
  dcterms:hasVersion <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/1/revisions/1> ;
  dcterms:created "2025-07-30T00:57:31.311Z"^^xsd:dateTime .

<https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/1/revisions/1> a matsci:DefinitionRevision ;
  rdf:value "A device that converts chemical energy into electrical energy"@en ;
  skos:example "Fuel cell vehicles use nitrogen to power electric motors"@en ;
  dcterms:isVersionOf <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/1> ;
  prov:specializationOf <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/1> ;
  dcterms:creator "Colton Gerber" ;
  matsci:version "1"^^xsd:positiveInteger ;
  matsci:status "proposed" ;
  dcterms:created "2025-07-30T00:57:31.311Z"^^xsd:dateTime .

<https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/2> a matsci:Definition ;
  dcterms:isPartOf <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell> ;
  matsci:definitionNumber "2"^^xsd:positiveInteger ;
  matsci:currentRevision <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/2/revisions/1> ;
  dcterms:hasVersion <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/2/revisions/1> ;
  dcterms:created "2025-08-06T20:52:04.364Z"^^xsd:dateTime .

<https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/2/revisions/1> a matsci:DefinitionRevision ;
  rdf:value "A material exhibiting uniform properties in all directions and throughout its volume."@en ;
  skos:example "Quartz is a crystalline solid, demonstrating consistent hardness and refractive index across its structure."@en ;
  dcterms:isVersionOf <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/2> ;
  prov:specializationOf <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/2> ;
  dcterms:creator "gemma3" ;
  matsci:version "1"^^xsd:positiveInteger ;
  matsci:status "proposed" ;
  dcterms:created "2025-08-06T20:52:04.364Z"^^xsd:dateTime .

<https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/3> a matsci:Definition ;
  dcterms:isPartOf <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell> ;
  matsci:definitionNumber "3"^^xsd:positiveInteger ;
  matsci:currentRevision <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/3/revisions/1> ;
  dcterms:hasVersion <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/3/revisions/1> ;
  dcterms:created "2026-07-20T14:15:26.901Z"^^xsd:dateTime .

<https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/3/revisions/1> a matsci:DefinitionRevision ;
  rdf:value "a cell that has fule in it"@en ;
  skos:example "I like the fuel cell"@en ;
  dcterms:isVersionOf <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/3> ;
  prov:specializationOf <https://w3id.org/matsci-sam/vocabulary/id4/fuel_cell/definitions/3> ;
  dcterms:creator "Christopher Rauch" ;
  matsci:version "1"^^xsd:positiveInteger ;
  matsci:status "proposed" ;
  dcterms:created "2026-07-20T14:15:26.901Z"^^xsd:dateTime .