如何使用XPath分别捕获XML所有属性与文本，及在XSLT中单独获取指定属性值和文本值

Let's break down how to fix your XPath expressions and achieve what you need with your XML structure.

Issues with Your Current Code #

First, let's address why your existing variables aren't working as expected:

• For vQueryAttribute: The syntax @[localname()='name'] is invalid. To select the name attribute, use @name (or @*[localname()='name'] if you need to avoid namespace conflicts, though it's unnecessary here). Also, wrapping the expression in string() will only return the first attribute value, not all of them.
• For QueryText: $vQueryParam/request/args/arg[@name] selects all <arg> elements with a name attribute, but string() will only return the text of the first matching element.

1. Retrieve All Attribute Values and Text Nodes #

If you want to get every name attribute and its corresponding text value:

• All name attributes: Use this XPath to select all attributes:

  $vQueryParam/request/args/arg/@name
  

• All text values: Use this XPath to select all text nodes inside <arg> elements:

  $vQueryParam/request/args/arg/text()
  

2. Target Specific Attribute Values and Their Text #

To access individual entries like CacheVM, junk, or bcd:

• Get text for a specific attribute: For example, to fetch the text associated with CacheVM:

  $vQueryParam/request/args/arg[@name='CacheVM']/text()
  

• Get attribute value by position: If you know the index of the <arg> element, use:

  <!-- First attribute value -->
  $vQueryParam/request/args/arg[1]/@name
  <!-- First text value -->
  $vQueryParam/request/args/arg[1]/text()
  

3. Example XSLT to Loop Through All Entries #

If you want to process each <arg> element and output its attribute and text, use an <xsl:for-each> loop:

<xsl:for-each select="$vQueryParam/request/args/arg">
  <entry>
    <attribute-name><xsl:value-of select="@name"/></attribute-name>
    <text-value><xsl:value-of select="text()"/></text-value>
  </entry>
</xsl:for-each>

4. Correct Variable Definitions #

To store specific values in variables for later use:

<!-- Variable for CacheVM's text value -->
<xsl:variable name="cacheVmText" select="$vQueryParam/request/args/arg[@name='CacheVM']/text()"/>

<!-- Variable for the second arg's attribute name -->
<xsl:variable name="secondArgName" select="$vQueryParam/request/args/arg[2]/@name"/>

This gives you full control over accessing both attributes and text values in your XML structure.

内容的提问来源于stack exchange，提问作者Karthik Grandhi