请注意，将这些链接到一起的URI无关紧要，可以改用空白节点，即没有URI的资源。

Note that the URI of the resource linking everything together is not important; you can replace it with a blank node, which is a resource with no URI.

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清单5中用空白节点替换了资源，使用方括号表明其中的两个命题片断都使用空白节点主语。

In Listing 5, you replace the resource with a blank node and use square bracket notation to show that the two enclosed statement fragments have the same blank node subject.

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要映射指向专有名词的ldap属性，可将空白节点的类型指定为lmap： ObjectProperty。

To map an LDAP property that points to a distinguished name, designate the blank node to be of the lmap: ObjectProperty type.

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