在javascript中使用xpath
原文来自:?https://developer.mozilla.org/en/Introduction_to_using_XPath_in_JavaScript
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This could inadvertently grab some elements if one of its attributes existed that had a local name of "href", but it was a different attribute which had the targeted (XLink) namespace (instead of?@href).
In order to accurately grab elements with the XLink?@href?attribute (without also being confined to predefined prefixes in a namespace resolver), one could obtain them as follows:
count()?function.STRING_TYPE2A result containing a single string.BOOLEAN_TYPE3A result containing a single boolean value. This is useful for example, in an XPath expression using the?not()?function.UNORDERED_NODE_ITERATOR_TYPE4A result node-set containing all the nodes matching the expression. The nodes may not necessarily be in the same order that they appear in the document.ORDERED_NODE_ITERATOR_TYPE5A result node-set containing all the nodes matching the expression. The nodes in the result set are in the same order that they appear in the document.UNORDERED_NODE_SNAPSHOT_TYPE6A result node-set containing snapshots of all the nodes matching the expression. The nodes may not necessarily be in the same order that they appear in the document.ORDERED_NODE_SNAPSHOT_TYPE7A result node-set containing snapshots of all the nodes matching the expression. The nodes in the result set are in the same order that they appear in the document.ANY_UNORDERED_NODE_TYPE8A result node-set containing any single node that matches the expression. The node is not necessarily the first node in the document that matches the expression.FIRST_ORDERED_NODE_TYPE9A result node-set containing the first node in the document that matches the expression.?