@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 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:298553
  a <https://lod.nal.usda.gov/naltv#Chemical>, skos:Concept ;
  dc:created "2017-04-26"^^xsd:date ;
  dc:modified "2017-11-10"^^xsd:date ;
  skos:altLabel "polystyrene sulphonic acid"@en, "calcium polystyrene sulfonate"@en, "sodium polystyrene sulfonate"@en, "sodium polystyrene sulphonate"@en, "calcium polystyrene sulphonate"@en ;
  skos:broader nalt:25577 ;
  skos:inScheme <https://lod.nal.usda.gov/nalt> ;
  skos:prefLabel "polystyrene sulfonic acid"@en, "ácido sulfónico de poliestireno"@es ;
  skos:related nalt:6405 ;
  ns0:marc001 "83330" .

nalt:6405
  a ns0:Chemical, skos:Concept ;
  skos:prefLabel "potasio"@es, "potassium"@en ;
  skos:related nalt:298553 .

nalt:25577
  a ns0:Chemical, skos:Concept ;
  skos:narrower nalt:298553 ;
  skos:prefLabel "poliestirenos"@es, "polystyrenes"@en .