三元组图谱-SPARQL-表达式语义与使用示例(二)

values 使用方法

迭代结果并检索每个实例的可选属性：VALUES是一个SPARQL 1.1功能

SELECT * 
WHERE { VALUES(?uri) { <http://example.org/instance1> } 
        OPTIONAL {?uri rdfs:label ?label}. 
        OPTIONAL {?uri mbo:organisedBy ?organiser}. 
        OPTIONAL {?uri mbo:takesPlaceAt ?venue}. 
        OPTIONAL {?uri mbo:begin ?begin}. 
        OPTIONAL {?uri mbo:end ?end}. 
}

VALUES (?class ?classLabel) {
      (wd:Q186516 "national")
      (wd:Q22807280 "regional")
      (wd:Q97486724 "local")
      (wd:Q21850100 "local")
      (wd:Q97486760 "local")
      (wd:Q602300 "military")
      (wd:Q27077627 "military")
      (wd:Q104911496 "military")
      (wd:Q83302753 "religious")
      (