@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix nalt: <https://lod.nal.usda.gov/nalt/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@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 .
nalt:341427_def
  a <https://lod.nal.usda.gov/naltv#Definition> ;
  rdf:value "An ecological study is an observational study in which data is analysed at the population or group level rather than at an individual level. These studies are often conducted to measure risk factors, prevalence and incidence of a disease at a population level."@en, "Estudios observacionales en los que los datos se analizan en el ámbito poblacional o grupal, en lugar de hacerlo en el plano individual. Se suelen llevar a cabo para medir factores de riesgo, la prevalencia y la incidencia de una enfermedad en una población."@es ;
  dc:source "NAL Thesaurus Staff" .

<https://lod.nal.usda.gov/nalt>
  a skos:ConceptScheme ;
  rdfs:label "NALT Full"@en .

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

nalt:341427
  a <https://lod.nal.usda.gov/naltv#Topic>, skos:Concept ;
  dc:created "2020-07-16"^^xsd:date ;
  dc:modified "2020-10-29"^^xsd:date ;
  skos:altLabel "ecologic studies"@en ;
  skos:broader nalt:137077, nalt:37565 ;
  skos:definition nalt:341427_def ;
  skos:inScheme <https://lod.nal.usda.gov/nalt> ;
  skos:prefLabel "estudios ecológicos"@es, "ecological studies"@en ;
  ns0:marc001 "95694" .

nalt:137077
  a ns0:Topic, skos:Concept ;
  skos:narrower nalt:341427 ;
  skos:prefLabel "observational studies"@en, "estudios de observación"@es .

nalt:37565
  a ns0:Topic, skos:Concept ;
  skos:narrower nalt:341427 ;
  skos:prefLabel "estudios epidemiológicos"@es, "epidemiological studies"@en .