我这样说:
link[@rel= alternate and @type= text/html or not(@rel)]/@href | link/text()
?
确切地说,我不理解文号:
在XPath的管道(< >)配对。 因此,将归还连接要素(与上游相匹配)和任何链接内容的原始属性。
因此,就象碎片一样。
<link>test</link>
<link href="http://www.google.com">Google</link>
<link rel="zzzz" href="http://www.stackoverflow.com">Stack Overflow</link>
页: 1
test
http://www.google.com
Google
Stack Overflow
符号是: 它贪.了与左侧或右侧相匹配的所有因素。
x说的是:
gr(因工会而):
祝福。
Acctually I don t understand the symbol |
www.un.org/Depts/DGACM/index_spanish.htm http://www.w3.org/TR/1999/REC-xpath-19991116/#NT-UnionExpr”rel=“nofollow” XPath Unionmente/a>。
http://www.w3.org/TR/2007/REC-xpath20-20070123/#combining_seq”rel=“nofollow”
•The union and | operators are equivalent. They take two node sequences as operands and return a sequence containing all the nodes that occur in either of the operands.
当然,只有XPath 2.0和XPath 1.0中加入“un”经营者,我们才有其早先的同义词,由>>>> 代码表示。
www.un.org/Depts/DGACM/index_spanish.htm 因此,在的特定情况下:
link[@rel= alternate and @type= text/html or not(@rel)]/@href | link/text()
<>XPath 以上表述选择了两套:的结合:
由以下单位选定的所有节点:link[@rel=校正和@type=text/html或(@rel)]/@href
所有节点:<代码>link/text()
工会是塞克斯岛(和数学)的一个标准业务,尽管U号是用来代表当地的工会。
www.un.org/Depts/DGACM/index_spanish.htm http://en.wikipedia.org/wiki/Union_%28set_theory%29”rel=“nofollow” Wikipedia:
The union of two sets A and B is the collection of points which are in A or in B (or in both):
www.un.org/Depts/DGACM/index_spanish.htm 简单的例子:
A = {1,2,3,4,5,6}
B = {1,5,6,7,8}
A U B = {1,2,3,4,5,6,7,8}
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