Xpath:从 id 属性与 id 锚的匹配中找到一个元素值 [英] Xpath: find an element value from a match of id attribute to id anchor

问题描述

我想找到与 id 属性匹配的元素的值，我只有 ref - 带有 # 的位，锚点.

I would like to find the value of an element matched on id attribute for which I only have the ref - the bit with #, the anchor.

我正在寻找partyId的值:

I am looking for the value of partyId:

 < party id="partyA" >
   < partyId >THEID< /partyId >

但是为了到达那里我只有以下的href

but to get there I only have the href from the following

  < MyData >
    < MyReference href="#partyA" />

去掉# 符号对我来说不好看.

Strip the # sign does not look good to me.

有什么提示吗?

推荐答案

因为你没有提供完整的 XML 文档，我不得不使用 // —— 我强烈建议避免这种做法.

Because you haven't provided complete XML documents, I have to use // -- a practice I strongly recommend to avoid.

假设

$vDataRef

定义为

//MyData/MyReference/@href

并且它的字符串值是"#partyA"，那么一种可能的选择所需节点的XPath表达式是:

and its string value is "#partyA", then one possible XPath expression that selects the wanted node is:

//party[@id=substring($vDataRef,2)]

如果 XML 文档有一个 DTD，其中 party 的 id 属性被定义为 ID 类型，那么它是使用标准XPath函数更方便、更高效id():

In case the XML document has a DTD in which the id attribute of party is defined to be of type ID, then it is more convenient and efficient to use the standard XPath function id():

id(substring($vDataRef,2))

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