即使有数据，结果也会被过滤掉 [英] Results filtered out even though the data is there

问题描述

这是我的查询：

PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> 
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> 
PREFIX foaf: <http://xmlns.com/foaf/0.1/> 
PREFIX : <http://dbpedia.org/resource/> 
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>

SELECT DISTINCT ?resource ?parentOrSpouse
WHERE { 
?resource a dbo:Royalty ; 
rdfs:label ?label ; 
dbo:parent ?parent ; 
dbo:birthDate ?bd ; 
dbo:birthPlace ?bp . 
?bp dbo:isPartOf :England . 
FILTER(?bd < '1900-01-01'^^xsd:dateTime) . 
FILTER(?bd > '1800-01-01'^^xsd:dateTime) . 
FILTER(LANGMATCHES(LANG(?label), 'en')) . 
{ ?resource dbo:parent ?parentOrSpouse } UNION { ?resource dbo:spouse ?parentOrSpouse }
?parentOrSpouse dbo:birthPlace ?psbp .
?psbp dbo:isPartOf :England . 
}
ORDER BY(?bd)

此搜索所有出生的王室成员

This searches for all royals born in England between 1800 and 1900 that have a spouse or parent that is born in England.

结果

在结果列表中，我得到

http://dbpedia.org/page/George_V 与 http://dbpedia.org/page/Mary_o f_Teck 被列为配偶，但George显然出生于英格兰时未列出Mary_of_Teck。

In the result list I get
http://dbpedia.org/page/George_V with http://dbpedia.org/page/Mary_of_Teck listed as a spouse, but not Mary_of_Teck listed while George is clearly born in England.

玛丽为什么失踪？当我查看数据时，还有很多其他人正在消失，这些人显然应该在列表中。

Why is Mary disappearing? There are a lot of other people disappearing that should clearly be on the list when I look at the data.

推荐答案

因此，解决方案玛丽不露面的原因是使用 dbo：parent | dbo：spouse / dbo：wikiPageRedirects？，因为玛丽是通过重定向来引用乔治的。

So the solution to Mary not showing up is to use dbo:parent|dbo:spouse/dbo:wikiPageRedirects?, since George is refered by Mary via a redirect.

另一个问题是 dbo：birthPlace / dbo：location？/ dbo：isPartOf dbr：England 抛出可能是（？）的错误与编译器中的错误有关。使用？parentOrSpouse dbo：birthPlace | dbo：birthPlace / dbo：location / dbo：isPartOf：England。似乎可以正常工作。

The other problem was dbo:birthPlace/dbo:location?/dbo:isPartOf dbr:England throwing an error that is probably(?) related to a bug in the compiler. Using ?parentOrSpouse dbo:birthPlace|dbo:birthPlace/dbo:location/dbo:isPartOf :England . instead seems to work fine.

信用转到@AKSW。

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