apps-android-commons/app/src/main/resources/queries/query_for_item.rq

SELECT
  ?item
  (SAMPLE(?label) AS ?label)
  (SAMPLE(?class) AS ?class)
  (SAMPLE(?description) AS ?description)
  (SAMPLE(?classLabel) AS ?classLabel)
  (SAMPLE(?pic) AS ?pic)
  (SAMPLE(?destroyed) AS ?destroyed)
  (SAMPLE(?endTime) AS ?endTime)
  (SAMPLE(?wikipediaArticle) AS ?wikipediaArticle)
  (SAMPLE(?commonsArticle) AS ?commonsArticle)
  (SAMPLE(?commonsCategory) AS ?commonsCategory)
WHERE {
  SERVICE <https://query.wikidata.org/sparql> {
    values ?item {
      ${ENTITY}
    }
  }

  # Get the label in the preferred language of the user, or any other language if no label is available in that language.
  OPTIONAL {?item rdfs:label ?itemLabelPreferredLanguage. FILTER (lang(?itemLabelPreferredLanguage) = "${LANG}")}
  OPTIONAL {?item rdfs:label ?itemLabelAnyLanguage}
  BIND(COALESCE(?itemLabelPreferredLanguage, ?itemLabelAnyLanguage, "?") as ?label)

  # Get the description in the preferred language of the user, or any other language if no description is available in that language.
  OPTIONAL {?item schema:description ?itemDescriptionPreferredLanguage. FILTER (lang(?itemDescriptionPreferredLanguage) = "${LANG}")}
  OPTIONAL {?item schema:description ?itemDescriptionAnyLanguage}
  BIND(COALESCE(?itemDescriptionPreferredLanguage, ?itemDescriptionAnyLanguage, "?") as ?description)

  # Get the class label in the preferred language of the user, or any other language if no label is available in that language.
  OPTIONAL {
  ?item p:P31/ps:P31 ?class.
    OPTIONAL {?class rdfs:label ?classLabelPreferredLanguage. FILTER (lang(?classLabelPreferredLanguage) = "${LANG}")}
    OPTIONAL {?class rdfs:label ?classLabelAnyLanguage}
    BIND(COALESCE(?classLabelPreferredLanguage, ?classLabelAnyLanguage, "?") as ?classLabel)
  }

  OPTIONAL {
  ?item p:P31/ps:P31 ?class.
  }

  # Get picture
  OPTIONAL {?item wdt:P18 ?pic}

  # Get existence
  OPTIONAL {?item wdt:P576 ?destroyed}
  OPTIONAL {?item wdt:P582 ?endTime}

  # Get Commons category
  OPTIONAL {?item wdt:P373 ?commonsCategory}

  # Get Wikipedia article
  OPTIONAL {
    ?wikipediaArticle schema:about ?item.
    ?wikipediaArticle schema:isPartOf <https://en.wikipedia.org/>. # TODO internationalization
  }

  # Get Commons article
  OPTIONAL {
    ?commonsArticle schema:about ?item.
    ?commonsArticle schema:isPartOf <https://commons.wikimedia.org/>.
  }
}
GROUP BY ?item