如何查询特定DBpedia资源/页面的多个实体？ [英] How to query a particular DBpedia Resource/Page for multiple entities?

问题描述

我有许多DBpedia页面的链接，例如：

http：// dbpedia .org / resource / Harry_Potter

http：// dbpedia。 org / resource / Twilight_（series）

http://dbpedia.org / resource / Bible

http://dbpedia.org/resource/Manga

I have links to a number of DBpedia pages like:
http://dbpedia.org/resource/Harry_Potter
http://dbpedia.org/resource/Twilight_(series)
http://dbpedia.org/resource/Bible
http://dbpedia.org/resource/Manga

我想为它们中的每一个获取Abstract和Thumbnail实体。

I would like to get the Abstract and Thumbnail entities for each one of them.

我可以使用以下方法分别获取它们：

I can get them individually using:

• 对于摘要：

• For Abstract:

PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX res: <http://dbpedia.org/resource/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT ?label
WHERE { <http://dbpedia.org/resource/Harry_Potter>
          dbo:abstract ?label . FILTER (lang(?label) = \'en\')}

对于缩略图：

For Thumbnail:

PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX res: <http://dbpedia.org/resource/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT ?thumbnail
WHERE { <http://dbpedia.org/resource/Harry_Potter>
          dbo:thumbnail ?thumbnail}

是否可以将以上两个查询合并为一个查询。我对SPARQL非常陌生，无法通过

Is it possible to combine the above two queries into a single one. I am very new to SPARQL and couldn't get it to work.

另外，有没有比我目前的方法更好的查询方法？

Additionally, is there a better way to query than my current approach?

推荐答案

当然可以将它们组合在一起，简单的方法就是将两个 WHERE的主体连接起来 s并相应地调整 SELECT ：

Of course it's possible to combine them, the trivial way to do it would be just to concatenate the bodies of the two WHEREs and adjust the SELECT accordingly:

SELECT ?label ?thumbnail
WHERE {
    <http://dbpedia.org/resource/Harry_Potter> dbo:abstract ?label . 
    FILTER (lang(?label) = 'en')
    <http://dbpedia.org/resource/Harry_Potter> dbo:thumbnail ?thumbnail .
}

如果您想更简洁，可以将两个三元组与同一个主题使用; ：

If you want to be more succinct, you can combine two triples with the same subject using ;:

SELECT ?label ?thumbnail
WHERE {
    <http://dbpedia.org/resource/Harry_Potter>
        dbo:abstract ?label ; 
        dbo:thumbnail ?thumbnail .
    FILTER (lang(?label) = 'en')
}

并且由于定义了 res：前缀，因此可以使用它来缩短URI：

And since you defined the res: prefix, you can use that to shorten the URI:

SELECT ?label ?thumbnail
WHERE {
    res:Harry_Potter
        dbo:abstract ?label ; 
        dbo:thumbnail ?thumbnail .
    FILTER (lang(?label) = 'en')
}

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