您可以在以下位置运行以下查询链接 MDB SPARQL 资源管理器 http://www.linkedmdb.org/snorql/。的价值观?imdbID（最后一个变量）包含来自三个可能域（freebase.com、rottentomatoes.com 或 imdb.com）之一的 IRI。我想知道如何申请filter这样仅保留来自 imdb.com 域的行。
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX dc: <http://purl.org/dc/terms/>
PREFIX movie: <http://data.linkedmdb.org/resource/movie/>
SELECT ?title ?date ?director ?imdbID
WHERE {
?film foaf:page ?imdbID.
?film dc:title ?title.
?film dc:date ?date .
?film movie:director ?directorURI.
?directorURI rdfs:label ?director .
}
不知道为什么 @JoshuaTaylor 没有将其作为答案发布，但将 @JoshuaTaylor 的过滤器添加到您的查询中正是您所要求的：
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX dc: <http://purl.org/dc/terms/>
PREFIX movie: <http://data.linkedmdb.org/resource/movie/>
SELECT ?title ?date ?director ?imdbID
WHERE {
?film foaf:page ?imdbID.
?film dc:title ?title.
?film dc:date ?date .
?film movie:director ?directorURI.
?directorURI rdfs:label ?director .
FILTER(regex(str(?imdbID), "www.imdb.com" ) )
}
返回：
<?xml version="1.0"?>
<sparql
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:xs="http://www.w3.org/2001/XMLSchema#"
xmlns="http://www.w3.org/2005/sparql-results#" >
<head>
<variable name="title"/>
<variable name="date"/>
<variable name="director"/>
<variable name="imdbID"/>
</head>
<results>
<result>
<binding name="title">
<literal>Buffy the Vampire Slayer</literal>
</binding>
<binding name="date">
<literal>1992-07-31</literal>
</binding>
<binding name="director">
<literal>Fran Rubel Kuzui (Director)</literal>
</binding>
<binding name="imdbID">
<uri>http://www.imdb.com/title/tt0103893</uri>
</binding>
</result>
<result>
<binding name="title">
<literal>Batman</literal>
</binding>
<binding name="date">
<literal>1989-06-23</literal>
</binding>
<binding name="director">
<literal>Tim Burton (Director)</literal>
</binding>
<binding name="imdbID">
<uri>http://www.imdb.com/title/tt0096895</uri>
</binding>
</result>
<result>
<binding name="title">
<literal>Batman</literal>
</binding>
<binding name="date">
<literal>1966-07-30</literal>
</binding>
<binding name="director">
<literal>Leslie H. Martinson (Director)</literal>
</binding>
<binding name="imdbID">
<uri>http://www.imdb.com/title/tt0060153</uri>
</binding>
</result>
<result>
<binding name="title">
<literal>Batman & Robin</literal>
</binding>
<binding name="date">
<literal>1997-06-20</literal>
</binding>
<binding name="director">
<literal>Joel Schumacher (Director)</literal>
</binding>
<binding name="imdbID">
<uri>http://www.imdb.com/title/tt0118688</uri>
</binding>
</result>
<result>
<binding name="title">
<literal>Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb</literal>
</binding>
如果你想让它不区分大小写，你可以使用i像这样标记：
FILTER(regex(str(?imdbID), "www.IMDB.com", "i" )
如果您想了解有关过滤器的更多信息，请查看3.1 限制字符串的值 http://www.w3.org/TR/sparql11-query/#restrictString.
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