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我正在研究RDF查询语言。所以,我已经安装了Apache Jena。下面
RDF给出的数据是:空白节点的ARQ查询
@prefix foaf: <http://xlmns.com/foaf/0.1/> .
_:a foaf:name "Alice" .
_:b foaf:name "Ashish" .
和ARQ查询:
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
SELECT ?x ?name
WHERE { ?x foaf:name ?name }
问题 - 我的结果是:
+---+------+
| x | name |
+---+------+
+---+------+
正确的结果是:
+-----+---------+
| x | name |
+-----+---------+
| _:c | "Alice" |
| _:d | "Bob" |
+-----+---------+
哦!失误错误。谢谢Joshua Tayar –