Finder searches for the first node matching some criteria and returns it.
Finder 搜索匹配某些标准的第一个节点,并返回该节点。
The list of matching nodes is normally rather terse, including just the node name and the node's internal handle.
匹配节点的列表通常是相当简洁的,只包括节点名和节点的内部句柄。
The extra node holds information about what to do when matching the XPath.
这个额外的节点保存关于匹配XPath时要做什么的信息。
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