dbpedia-sparql-client/examples/json/test.js

A simple DBpedia SPARQL client

var dps = require('../../index').default;


/*
PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX dbo: <http://dbpedia.org/ontology/>
SELECT * WHERE {
  ?s rdfs:label "Graves Park"@en .
  ?s a dbo:Place .
  ?s geo:lat ?lat .
  ?s geo:long ?long .
} 
*/

const name = "China";
const query = `
      PREFIX dbpedia2: <http://dbpedia.org/property/>
      PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
      PREFIX d: <http://dbpedia.org/ontology/>

      SELECT ?name ?thumb ?comment ?description ?openingDate (group_concat(?link;separator="|") as ?links) WHERE {
        ?park rdfs:label "${name}"@en ;
              d:abstract ?description ;
              rdfs:comment ?comment ;
              foaf:isPrimaryTopicOf ?name .
              OPTIONAL { ?park dbo:wikiPageExternalLink ?link } .
              OPTIONAL { ?park d:thumbnail ?thumb } .
              OPTIONAL { ?park dbpedia2:logoImage ?thumb } .
              OPTIONAL { ?park d:openingDate ?openingDate } .
              OPTIONAL { ?park dbpedia2:opened ?openingDate } .
          FILTER ( lang(?description) = "en")
          FILTER ( lang(?comment) = "en")
      }
    GROUP BY ?name ?thumb ?comment ?description ?openingDate
    `;

dps.client()
  .query(query)
  .asJson()
  .then(function(r) {
    console.log(JSON.stringify(r, null, 2));
  })
  .catch(function(e) {
    console.error("ERROR: "+e);
  })