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W3C对xpath的阐述

Here are some examples of location paths using the unabbreviated syntax:

child::para selects the para element children of the context node
child::* selects all element children of the context node
child::text() selects all text node children of the context node
child::node() selects all the children of the context node, whatever their node type
attribute::name selects the name attribute of the context node
attribute::* selects all the attributes of the context node
descendant::para selects the para element descendants of the context node
ancestor::div selects all div ancestors of the context node
ancestor-or-self::div selects the div ancestors of the context node and, if the context node is a div element, the context node as well
descendant-or-self::para selects the para element descendants of the context node and, if the context node is a para element, the context node as well
self::para selects the context node if it is a para element, and otherwise selects nothing
child::chapter/descendant::para selects the para element descendants of the chapter element children of the context node
child::*/child::para selects all para grandchildren of the context node
/ selects the document root (which is always the parent of the document element)
/descendant::para selects all the para elements in the same document as the context node
/descendant::list/child::item selects all the item elements that have an olist parent and that are in the same document as the context node
child::para[position()=1] selects the first para child of the context node
child::para[position()=last()] selects the last para child of the context node
child::para[position()=last()-1] selects the last but one para child of the context node
child::para[position()>1] selects all the para children of the context node other than the first para child of the context node
following-sibling::chapter[position()=1] selects the next chapter sibling of the context node
preceding-sibling::chapter[position()=1] selects the previous chapter sibling of the context node
/descendant::figure[position()=42] selects the forty-second figure element in the document
/child::doc/child::chapter[position()=5]/child::section[position()=2] selects the second section of the fifth chapter of the doc document element
child::para[attribute::type="warning"] selects all para children of the context node that have a type attribute with value warning
child::para[attribute::type='warning'][position()=5] selects the fifth para child of the context node that has a type attribute with value warning
child::para[position()=5][attribute::type="warning"] selects the fifth para child of the context node if that child has a type attribute with value warning
child::chapter[child::title='Introduction'] selects the chapter children of the context node that have one or more title children with string-value equal to Introduction
child::chapter[child::title] selects the chapter children of the context node that have one or more title children
child::*[self::chapter or self::appendix] selects the chapter and appendix children of the context node
child::*[self::chapter or self::appendix][position()=last()] selects the last chapter or appendix child of the context node

详细参考
地址：http://www.w3.org/TR/xpath

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发表于 2007-1-31 12:30 资料个人空间短消息加为好友

少发英文资料,翻译了再发嘛!
毕竟像我这样读不懂的人还是很多的

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发表于 2007-2-1 09:43 资料个人空间短消息加为好友

添加 yorsal 为MSN好友

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我觉得我们是不是应该开个＜英文学习＞板块呢～

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发表于 2007-2-5 16:40 资料个人空间短消息加为好友

应该是有人支持滴

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发表于 2007-2-21 10:16 资料个人空间主页短消息加为好友

我支持，这个专业的，也只是英文的，不行，你要看多英文的资料。

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发表于 2007-4-10 23:07 资料个人空间短消息加为好友

嘿
同意
开一个英文学习

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发表于 2007-7-5 14:43 资料个人空间主页短消息加为好友

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支持，学习，顶上去啊

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