查詢SPARQL不適用於「dct：subject」

-1

SELECT ?name ?birth ?person ?subject 

WHERE {  ?person dbo:birthPlace :London .  ?person 

dbo:birthDate ?birth .  ?person foaf:name ?name . 

?person dct:subject :English_rock_singers. ?person dct:subject ? 

subject. } ORDER BY ?name

此查詢僅在刪除「主題」時有效。有沒有辦法用類別查詢dbpedia？查詢SPARQL不適用於「dct：subject」

來源

2017-06-26 Mirko Bonezzi

是[此輸出（https://dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&query=SELECT+%3Fname+%3Fbirth++%3Fperson+% 3Fsubject％0D％0A％0D％0AWHERE +％7B％0D％0A％3Fperson + DBO％3AbirthPlace + DBR％3ALondon +。％0D％0A％3Fperson + DBO％3AbirthDate +％3Fbirth +。％0D％0A％3Fperson + FOAF％3Aname +％ 3Fname + ++。％0D％0A％0D％0A％3Fperson + DCT％3Asubject + DBC％3AEnglish_rock_singers。％0D％0A％3Fperson + DCT％3Asubject +％3Fsubject。+++％7D％0D％0AORDER + BY +％3Fname％ 0D％0A＆format = text％2Fhtml＆CXML_redir_for_subjs = 121＆CXML_redir_for_hrefs =＆timeout = 30000＆debug = on）你想要什麼？ –

雖然你的問題並不清楚，但我認爲你的問題是格式化查詢和定義前綴。這應該工作：

PREFIX dbo: <http://dbpedia.org/ontology/> 
PREFIX foaf: <http://xmlns.com/foaf/0.1/> 
PREFIX dct: <http://purl.org/dc/terms/> 
PREFIX dbr: <http://dbpedia.org/resource/> 
PREFIX dbc: <http://dbpedia.org/resource/Category:> 

SELECT ?name ?birth ?person ?subject WHERE { 

    ?person dbo:birthPlace dbr:London. 
    ?person dbo:birthDate ?birth.  
    ?person foaf:name ?name. 
    ?person dct:subject dbc:English_rock_singers. 
    ?person dct:subject ?subject. 
} 
ORDER BY ?name

來源

2017-06-26 15:05:59

查詢SPARQL不適用於「dct：subject」

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