三個子屬性的SPARQL查詢不起作用

我試圖做一個SPARQL查詢但我失敗了。我有三個屬性，我要問的那樣：三個子屬性的SPARQL查詢不起作用

SELECT DISTINCT ?locality ?museRes ?calendar ?category 
FROM <http://opendata.cs.pub.ro/repo/context/TTT> 
WHERE { 
{ 
?museRes vCard:locality ?locality FILTER (regex(?museRes, "odaia_bunicii", "i")) . 
?museRes vCard:category ?category FILTER (regex(?museRes, "odaia_bunicii", "i")). 
?museRes vCard:hasCalendarRequest ?calendar FILTER (regex(?museRes, "odaia_bunicii", "i")) 
} 
}

在Romanian OpenData SPARQL endpoint

的問題是，三個屬性是從其他三超性能（DCTERMS部分：spatials，DCTERMS：描述和opendata：MuseumTour），這種方法不起作用。我試着用OPTION運算符，但它只顯示我？museRes和？locality的值甚至？calendar和？category不是空的。

最後，我嘗試使用UNION而不是OPTION，但它僅適用於一個UNION，而且我需要使用兩個UNION運算符。

如何在上述RDF中要求vCard：locality vCard：category和vCard：hasCalendarRequest？

<rdf:RDF 
    xmlns:marcrel="http://www.loc.gov/loc.terms/relators/" 
    xmlns:dcterms="http://purl.org/dc/terms/" 
    xmlns:dc="http://purl.org/dc/elements/1.1/" 
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" 
    xmlns:dcmitype="http://purl.org/dc/dcmitype/" 
    xmlns:opendata="http://opendata.cs.pub.ro/property/" 
    xmlns:vCard="http://www.w3.org/2006/vcard/ns#" 
    xmlns:dbPedia="http://dbpedia.org/ontology/" 
    xmlns:cdtype="http://purl.org/cld/cdtype/" 
    xmlns:cld="http://purl.org/cld/terms/"> 
    <dbPedia:Museum rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/"> 
    <dcterms:description> 
     <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Info/"> 
     <dc:identifier>7172383</dc:identifier> 
     <opendata:FoundingYear>2016</opendata:FoundingYear> 
     <dc:title xml:lang="en"></dc:title> 
     <dcterms:isReferencedBy></dcterms:isReferencedBy> 
     <marcrel:OWN> 
      <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Info/Own/"> 
      <dc:identifier></dc:identifier> 
      <dc:title></dc:title> 
      </rdf:Description> 
     </marcrel:OWN> 
     <opendata:Accreditation></opendata:Accreditation> 
     <dc:subject> 
      <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Info/Subject/"> 
      <vCard:value xml:lang="en"></vCard:value> 
      <vCard:label xml:lang="en">Specific (Principal) profile</vCard:label> 
      <vCard:label>Profil specific (principal)</vCard:label> 
      <vCard:value>Etnografie</vCard:value> 
      <vCard:label>Profil general</vCard:label> 
      </rdf:Description> 
     </dc:subject> 
     <dc:title>"Odaia Bunicii" - Centrul Folcloric Grădiniţa, Galicea Mare</dc:title> 
     <vCard:hasCategory> 
      <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Info/Category/"> 
      <opendata:MainCategory xml:lang="en">Museum</opendata:MainCategory> 
      <opendata:MainCategory>Muzeu</opendata:MainCategory> 
      <vCard:category xml:lang="en"></vCard:category> 
      <vCard:category>Muzeu Comunal</vCard:category> 
      </rdf:Description> 
     </vCard:hasCategory> 
     <dcterms:description> 
      <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Info/Description/"> 
      <opendata:Historic xml:lang="en"></opendata:Historic> 
      <opendata:Historic></opendata:Historic> 
      <dcterms:abstract xml:lang="en"></dcterms:abstract> 
      <dcterms:abstract></dcterms:abstract> 
      <dcterms:description xml:lang="en"></dcterms:description> 
      <dcterms:description>Centrul folcloric al grădiniţei Galicea Mare este situat în incinta Grădiniţei nr.1, structură a Şcolii Gimnaziale Galicea Mare, judeţul Dolj, pe drumul european E56. Pentru a readuce la viaţă şi a reînvia atât tradiţiile cât şi portul popular românesc, a luat naştere „Odaia bunicii」, un loc in care obiectele prind viaţă şi creează o atmosferă caldă, plina de dragostea ţaranilor de altadată. Expoziţia permanentă, deschisă în 2016, este concepută într-o manieră tradiţională, fiecare obiect aşteptând să fie folosit pentru a-şi arata maiestria, astfel: patul cu tablii de lemn şi saltea de paie aşteaptă să odihnească omul, măsuţa din lemn şi scaunelele aşteaptă cu nerăbdare să fie servită cina, dar şi războiul ţăranesc unde femeile ţeseau macate ne reamintesc nouă, celor mari, şi îi învaţă pe cei mici despre obiceiurile şi tradiţiile româneşti de altădată.</dcterms:description> 
      <opendata:Relevance xml:lang="en">Local</opendata:Relevance> 
      <opendata:Relevance>Locală</opendata:Relevance> 
      </rdf:Description> 
     </dcterms:description> 
     </rdf:Description> 
    </dcterms:description> 
    <dbPedia:Building> 
     <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Building/"> 
     <dbPedia:HistoricBuilding></dbPedia:HistoricBuilding> 
     <dcterms:abstract xml:lang="en"></dcterms:abstract> 
     <dcterms:abstract></dcterms:abstract> 
     <dc:identifier></dc:identifier> 
     <dc:type xml:lang="en">Building</dc:type> 
     <dc:type>Cladire</dc:type> 
     </rdf:Description> 
    </dbPedia:Building> 
    <opendata:MuseumTour> 
     <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Tour/"> 
     <vCard:hasCalendarRequest xml:lang="en">Unspecified</vCard:hasCalendarRequest> 
     <vCard:hasCalendarRequest>luni-vineri 8:00-13:00</vCard:hasCalendarRequest> 
     <opendata:VirtualTour></opendata:VirtualTour> 
     </rdf:Description> 
    </opendata:MuseumTour> 
    <opendata:Contact> 
     <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Contact/"> 
     <vCard:url> 
      <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Contact/URI/"> 
      <opendata:SocialMediaUri> 
       <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Contact/URI/SocialMediaUri/"> 
       <vCard:label>Link-uri social media.</vCard:label> 
       <vCard:hasValue></vCard:hasValue> 
       </rdf:Description> 
      </opendata:SocialMediaUri> 
      <opendata:CimecUri> 
       <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Contact/URI/CimecUri/"> 
       <vCard:label>Link-ul catre portalul CIMEC.</vCard:label> 
       <vCard:hasValue>http://ghidulmuzeelor.cimec.ro/id.asp?k=2030&amp;-„Odaia-bunicii」-Centrul-folcloric-Gradinita,-Galicea-Mare-GALICEA-MARE-Dolj</vCard:hasValue> 
       </rdf:Description> 
      </opendata:CimecUri> 
      <opendata:WebUri> 
       <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Contact/URI/WebUri/"> 
       <vCard:label>Link-ul catre site-ul muzeului.</vCard:label> 
       <vCard:hasValue></vCard:hasValue> 
       </rdf:Description> 
      </opendata:WebUri> 
      </rdf:Description> 
     </vCard:url> 
     <vCard:Individual> 
      <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Contact/Individual/"> 
      <opendata:Employee> 
       <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Contact/Individual/Employee/"> 
       <vCard:hasName>Gologan Veronica</vCard:hasName> 
       <vCard:hasRole>Profesor</vCard:hasRole> 
       </rdf:Description> 
      </opendata:Employee> 
      <opendata:Manager> 
       <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Contact/Individual/Manager/"> 
       <vCard:hasName>Văduva Cristian</vCard:hasName> 
       <vCard:hasRole>Director</vCard:hasRole> 
       </rdf:Description> 
      </opendata:Manager> 
      </rdf:Description> 
     </vCard:Individual> 
     <vCard:hasEmail></vCard:hasEmail> 
     <vCard:hasTelephone> 
      <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Contact/Telephone/"> 
      <vCard:Fax> 
       <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Contact/Telephone/Fax/"> 
       <vCard:rev></vCard:rev> 
       <vCard:value></vCard:value> 
       </rdf:Description> 
      </vCard:Fax> 
      <vCard:Work> 
       <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Contact/Telephone/Work/"> 
       <vCard:rev></vCard:rev> 
       <vCard:value>0251.316.006; 0762.278.850</vCard:value> 
       </rdf:Description> 
      </vCard:Work> 
      </rdf:Description> 
     </vCard:hasTelephone> 
     </rdf:Description> 
    </opendata:Contact> 
    <dcterms:spatials> 
     <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Spatials/"> 
     <vCard:hasAddress> 
      <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Spatials/Address/"> 
      <vCard:postal-code>207270</vCard:postal-code> 
      <vCard:region>Dolj</vCard:region> 
      <dbPedia:AdministrativeRegion>Galicea Mare</dbPedia:AdministrativeRegion> 
      <vCard:hasLocality> 
       <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Spatials/Locality/"> 
       <opendata:Siruta></opendata:Siruta> 
       <vCard:locality>Galicea Mare</vCard:locality> 
       </rdf:Description> 
      </vCard:hasLocality> 
      <vCard:street-address>Str. Calafatului nr. 10</vCard:street-address> 
      </rdf:Description> 
     </vCard:hasAddress> 
     <opendata:Access xml:lang="en"></opendata:Access> 
     <opendata:Access></opendata:Access> 
     <vCard:hasGeo> 
      <rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/_Odaia_Bunicii-Centrul_Folcloric_Gradinita_Galicea_Mare_Dolj/Spatials/GeoPos/"> 
      <vCard:longitude>23.3</vCard:longitude> 
      <vCard:latitude>44.1</vCard:latitude> 
      <vCard:label>Localitate</vCard:label> 
      </rdf:Description> 
     </vCard:hasGeo> 
     </rdf:Description> 
    </dcterms:spatials> 
    </dbPedia:Museum> 
</rdf:RDF>

來源

2017-06-12 Doro

爲什麼你有相同的'FILTER'三次？這是多餘的 – AKSW

而運營商被稱爲'可選'。說實話，目前還不清楚你使用'OPTIONAL'做了什麼，因爲你沒有顯示不起作用的查詢 – AKSW

-1

3-4個小時後，我找到了解決辦法：

SELECT DISTINCT ?locality ?category ?calendar ?importanta 
FROM <http://opendata.cs.pub.ro/repo/context/ilie> 
WHERE { 
?a vCard:locality ?locality. FILTER (regex(?a, "odaia_bunicii", "i")). 
?b vCard:category ?category. FILTER (regex(?b, "odaia_bunicii", "i")). 
?c vCard:hasCalendarRequest ?calendar. FILTER (regex(?c, "odaia_bunicii", "i")). 
?d openDataP:Relevance ?importanta. FILTER (regex(?d, "odaia_bunicii", "i")). 
}

來源

2017-06-12 15:02:09 Doro

解決方案是什麼？這是任何事情，但不是解決方案：查詢中的三重模式中沒有一個與另一個連接，即共享一個變量。這意味着，它返回所有的笛卡爾積，我不認爲這是一個有用的查詢。 – AKSW

可否幫我查詢答案，因爲我不太瞭解？ – Doro

@AKSW我發佈了一個新答案...請問你是否認爲這很好？ – Doro

一個更好的答案...

SELECT DISTINCT ?o ?museum_res ?locality ?calendar ?category ?importanta 
FROM <http://opendata.cs.pub.ro/repo/context/TTT> 
WHERE { 
{ 
    ?museum_res ?p ?o. 
    ?e dc:title ?title. 
    ?a vCard:locality ?locality. 
    ?b vCard:category ?category. 
    ?c vCard:hasCalendarRequest ?calendar. 
    ?d openDataP:Relevance ?importanta. 
    FILTER (
    UCASE(?o) = UCASE("http://dbpedia.org/ontology/Museum") && 
    contains(?title, "Odaia") && 
    contains(?e, ?museum_res) && 
    contains(?a, ?museum_res) && langMatches(lang(?locality),"") && 
    contains(?b, ?museum_res) && langMatches(lang(?category),"") && 
    contains(?c, ?museum_res) && langMatches(lang(?calendar),"") && 
    contains(?d, ?museum_res) &&langMatches(lang(?importanta),"") 
    ) 
} 
} 
ORDER BY ?museum_res 
LIMIT 1200

來源

2017-06-13 12:55:12 Doro

這是一個無用的SPARQL查詢。沒有三重模式與另一個三重模式共享一個變量。請參閱vCard：locality？locality。？b vCard：category？category.'你認爲它有什麼作用？ – AKSW

三個子屬性的SPARQL查詢不起作用

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