@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/id4/2d_material> a skos:Concept ;
  skos:inScheme <https://w3id.org/matsci-sam/vocabulary/id4> ;
  skos:prefLabel "2d material"@en ;
  matsci:canonicalDefinition <https://w3id.org/matsci-sam/vocabulary/id4/2d_material/definitions/2> ;
  skos:definition <https://w3id.org/matsci-sam/vocabulary/id4/2d_material/definitions/1/revisions/1> ;
  skos:definition <https://w3id.org/matsci-sam/vocabulary/id4/2d_material/definitions/2/revisions/1> ;
  dcterms:contributor "Colton Gerber" ;
  dcterms:contributor "gemma3" ;
  dcterms:created "2025-10-20"^^xsd:date .

<https://w3id.org/matsci-sam/vocabulary/id4/2d_material/definitions/1> a matsci:Definition ;
  dcterms:isPartOf <https://w3id.org/matsci-sam/vocabulary/id4/2d_material> ;
  matsci:definitionNumber "1"^^xsd:positiveInteger ;
  matsci:currentRevision <https://w3id.org/matsci-sam/vocabulary/id4/2d_material/definitions/1/revisions/1> ;
  dcterms:hasVersion <https://w3id.org/matsci-sam/vocabulary/id4/2d_material/definitions/1/revisions/1> ;
  dcterms:created "2025-10-20T18:48:45.596Z"^^xsd:dateTime .

<https://w3id.org/matsci-sam/vocabulary/id4/2d_material/definitions/1/revisions/1> a matsci:DefinitionRevision ;
  rdf:value "A material that is 1-20 atomic layers thick."@en ;
  skos:example "graphene"@en ;
  dcterms:isVersionOf <https://w3id.org/matsci-sam/vocabulary/id4/2d_material/definitions/1> ;
  prov:specializationOf <https://w3id.org/matsci-sam/vocabulary/id4/2d_material/definitions/1> ;
  dcterms:creator "Colton Gerber" ;
  matsci:version "1"^^xsd:positiveInteger ;
  matsci:status "proposed" ;
  dcterms:created "2025-10-20T18:48:45.596Z"^^xsd:dateTime .

<https://w3id.org/matsci-sam/vocabulary/id4/2d_material/definitions/2> a matsci:Definition ;
  dcterms:isPartOf <https://w3id.org/matsci-sam/vocabulary/id4/2d_material> ;
  matsci:definitionNumber "2"^^xsd:positiveInteger ;
  matsci:currentRevision <https://w3id.org/matsci-sam/vocabulary/id4/2d_material/definitions/2/revisions/1> ;
  dcterms:hasVersion <https://w3id.org/matsci-sam/vocabulary/id4/2d_material/definitions/2/revisions/1> ;
  dcterms:created "2025-10-20T18:48:54.265Z"^^xsd:dateTime .

<https://w3id.org/matsci-sam/vocabulary/id4/2d_material/definitions/2/revisions/1> a matsci:DefinitionRevision ;
  rdf:value "A two-dimensional layer of atoms, typically a single element or a few elements, forming a sheet-like structure."@en ;
  skos:example "Graphene is a 2D material consisting of a single layer of carbon atoms arranged in a hexagonal lattice."@en ;
  dcterms:isVersionOf <https://w3id.org/matsci-sam/vocabulary/id4/2d_material/definitions/2> ;
  prov:specializationOf <https://w3id.org/matsci-sam/vocabulary/id4/2d_material/definitions/2> ;
  dcterms:creator "gemma3" ;
  matsci:version "1"^^xsd:positiveInteger ;
  matsci:status "community-reviewed" ;
  dcterms:created "2025-10-20T18:48:54.265Z"^^xsd:dateTime .