@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix nalt: <https://lod.nal.usda.gov/nalt/> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix agrovoc: <http://aims.fao.org/aos/agrovoc/> .
@prefix ns0: <https://lod.nal.usda.gov/naltv#> .

<https://lod.nal.usda.gov/naltv#marc001> rdfs:label "Field 001 in MARC Authority Format"@en .
<https://lod.nal.usda.gov/nalt>
  a skos:ConceptScheme ;
  rdfs:label "NALT Full"@en .

<https://lod.nal.usda.gov/naltv#Chemical>
  a owl:Class ;
  rdfs:label "Chemical"@en .

nalt:6400
  a skos:Concept, <https://lod.nal.usda.gov/naltv#Chemical> ;
  dc:created "2006-01-19"^^xsd:date ;
  dc:modified "2012-11-30"^^xsd:date ;
  skos:broader nalt:6401 ;
  skos:exactMatch <http://id.cabi.org/cabt/8140>, <http://id.agrisemantics.org/gacs/C31081>, <http://id.loc.gov/authorities/subjects/sh85003587>, agrovoc:c_264 ;
  skos:inScheme <https://lod.nal.usda.gov/nalt>, <https://lod.nal.usda.gov/nalt-core> ;
  skos:narrower nalt:6405, nalt:6407, nalt:6406, nalt:6404, nalt:6403, nalt:6402 ;
  skos:prefLabel "alkali metals"@en, "metales alcalinos"@es ;
  ns0:marc001 "1699" .

nalt:6402
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:6400 ;
  skos:prefLabel "cesio"@es, "cesium"@en .

nalt:6403
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:6400 ;
  skos:prefLabel "francium"@en, "francio"@es .

nalt:6404
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:6400 ;
  skos:prefLabel "litio"@es, "lithium"@en .

nalt:6406
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:6400 ;
  skos:prefLabel "rubidio"@es, "rubidium"@en .

nalt:6407
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:6400 ;
  skos:prefLabel "sodio"@es, "sodium"@en .

nalt:6405
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:6400 ;
  skos:prefLabel "potasio"@es, "potassium"@en .

nalt:6401
  a ns0:Chemical, skos:Concept ;
  skos:narrower nalt:6400 ;
  skos:prefLabel "elementos metálicos"@es, "metallic elements"@en .