本文介绍了使用SPARQL从DBpedia获取美国物理学家的名单的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想查询并获取物理学家列表。我该怎么做?
I want to query the American Physicsts and get the list of physicists. How can I do this?
推荐答案
您需要的SPARQL看起来像这样....
The SPARQL you need would look like this ....
PREFIX category: <http://dbpedia.org/resource/Category:>
PREFIX dcterms: <http://purl.org/dc/terms/>
SELECT *
WHERE {
?s dcterms:subject category:American_physicists .
}
查看结果
如果您想要带有更多谓词的列表,则需要使用变量?s
联接更多三元模式。例如,要检索每个物理学家的生日...
If you want the list with some extra predicates you need to join more triple patterns using the variable ?s
. For instance, to retrieve the birthdate for each physicist ...
PREFIX category: <http://dbpedia.org/resource/Category:>
PREFIX dcterms: <http://purl.org/dc/terms/>
PREFIX dbpedia: <http://dbpedia.org/ontology/>
SELECT *
WHERE {
?s dcterms:subject category:American_physicists .
?s dbpedia:birthDate ?bithdate .
}
结果
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