如何在DBPEDIA中使用SPARQL获得基于英语小说的电影

问题描述

使用SPARQL，我正在尝试获取所有英语小说及其属性的列表.

我还想查找是否根据该小说拍摄了一部电影，并获得了电影名称及其导演(如果存在电影关系).

代码:

SELECT ?movie ?director ?book ?author ?publisher ?illustrator
WHERE {
?movie  dcterms:subject  <http://dbpedia.org/resource/Category:films> ;
        dbpedia-owl:basedOn     ?book .
?movie dbp:director ?director .

?book a dbpedia-owl:Book .
?book dbp:author ?author .
?book dbp:publisher ?publisher .
?book dbp:illustrator ?illustrator .

}
limit 200

解决方案

如果您像这样修改查询，则可以得到很多正确的结果.

PREFIX     dcterms: <http://purl.org/dc/terms/>
PREFIX dbpedia-owl: <http://dbpedia.org/ontology/>
PREFIX         dbp: <http://dbpedia.org/property/>

SELECT ?book ?author ?movie ?director  ?publisher ?illustrator
WHERE {
?book a dbpedia-owl:Book .
  OPTIONAL {?book dbp:author ?author .}
  OPTIONAL {?book dbp:publisher ?publisher .}
  OPTIONAL {?book dbp:illustrator ?illustrator .}
  OPTIONAL {?book ^dbpedia-owl:basedOn ?movie . ?movie a dbpedia-owl:Film }
  OPTIONAL {?movie dbp:director ?director .}
}
LIMIT 200

...但是请记住，有许多电影未归类为dbpedia-owl:Film.然后，您当然可以用其他一些流行的类别制作union，但这仍不能保证不会有基于书籍的电影，也不会被遗漏.

那么，您所说的英语小说"是那些最初用英语写的还是由英语作者写的?

Using SPARQL, I am trying the get the list of all english novels and their properties.

I would also like to find if a movie was taken based on that novel and get the movie name and its director, If a movie relationship exists.

Code:

SELECT ?movie ?director ?book ?author ?publisher ?illustrator
WHERE {
?movie  dcterms:subject  <http://dbpedia.org/resource/Category:films> ;
        dbpedia-owl:basedOn     ?book .
?movie dbp:director ?director .

?book a dbpedia-owl:Book .
?book dbp:author ?author .
?book dbp:publisher ?publisher .
?book dbp:illustrator ?illustrator .

}
limit 200

解决方案

You can get a lot of correct results, if you modify your query like this...

PREFIX     dcterms: <http://purl.org/dc/terms/>
PREFIX dbpedia-owl: <http://dbpedia.org/ontology/>
PREFIX         dbp: <http://dbpedia.org/property/>

SELECT ?book ?author ?movie ?director  ?publisher ?illustrator
WHERE {
?book a dbpedia-owl:Book .
  OPTIONAL {?book dbp:author ?author .}
  OPTIONAL {?book dbp:publisher ?publisher .}
  OPTIONAL {?book dbp:illustrator ?illustrator .}
  OPTIONAL {?book ^dbpedia-owl:basedOn ?movie . ?movie a dbpedia-owl:Film }
  OPTIONAL {?movie dbp:director ?director .}
}
LIMIT 200

...but keep in mind that there are many movies that are not classified as dbpedia-owl:Film. Then of course you make a union with a few other popular classifications but that would still not guarantee there there won't be a movie based on a book, which will not be omitted.

And by the way what do you call "English novels" -- those written originally in English or those by English authors?

这篇关于如何在DBPEDIA中使用SPARQL获得基于英语小说的电影的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！