如何在XSLT中基于属性值匹配节点？附输入XML示例

First, let's assume your full XML looks something like this (filling in the truncated section for context):

<xml>
  <FeatureProduct>
    <Name>Spousal Guaranteed Lifetime Withdrawal Benefit</Name>
    <FeatureCode>SPB</FeatureCode>
    <FeatureOptConflict>
      <!-- Exclusive Benefits -->
      <FeatureCode>RIP</FeatureCode>
    </FeatureOptConflict>
    <FeatureOptProduct>
      <Name>Spousal Highest Daily Lifetime Income v3</Name>
      <ProductCode>SHDI3</ProductCode>
    </FeatureOptProduct>
  </FeatureProduct>
</xml>

Below are practical, actionable solutions to match nodes based on their values (like FeatureCode or ProductCode) in XSLT:

1. Match a Parent Node by Child Element Value #

If you want to target the entire <FeatureProduct> node where its <FeatureCode> equals SPB, use a template match with an XPath predicate to filter:

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="xml" indent="yes"/>

  <!-- Match FeatureProduct with FeatureCode = 'SPB' -->
  <xsl:template match="FeatureProduct[FeatureCode='SPB']">
    <SelectedBenefit>
      <BenefitName><xsl:value-of select="Name"/></BenefitName>
      <ExclusiveBenefit>
        <!-- Pull the conflicting FeatureCode from the nested section -->
        <xsl:value-of select="FeatureOptConflict/FeatureCode"/>
      </ExclusiveBenefit>
      <LinkedProduct>
        <xsl:value-of select="FeatureOptProduct/Name"/>
        <xsl:text> (Code: </xsl:text>
        <xsl:value-of select="FeatureOptProduct/ProductCode"/>
        <xsl:text>)</xsl:text>
      </LinkedProduct>
    </SelectedBenefit>
  </xsl:template>

  <!-- Default template to skip unmatched nodes/text -->
  <xsl:template match="text()|@*"/>
</xsl:stylesheet>

2. Directly Match Child Nodes by Value #

If you only need to target specific child nodes (e.g., the conflicting <FeatureCode> with value RIP), write a template for that exact node:

<xsl:template match="FeatureOptConflict/FeatureCode[.='RIP']">
  <ConflictWarning>
    <xsl:text>Benefit </xsl:text>
    <xsl:value-of select="."/>
    <xsl:text> cannot be combined with </xsl:text>
    <xsl:value-of select="../../FeatureCode"/>
  </ConflictWarning>
</xsl:template>

3. Parameterized Matching (For Reusable Logic) #

If you need to match dynamic values (e.g., a product code passed in at runtime), use parameters to make your templates flexible:

<xsl:param name="targetProductCode" select="'SHDI3'"/>

<xsl:template match="FeatureOptProduct[ProductCode=$targetProductCode]">
  <MatchedProduct>
    <ProductName><xsl:value-of select="Name"/></ProductName>
    <ProductCode><xsl:value-of select="ProductCode"/></ProductCode>
  </MatchedProduct>
</xsl:template>

Sample Output (From the First XSLT) #

When you run the first stylesheet against your XML, you'll get:

<SelectedBenefit>
  <BenefitName>Spousal Guaranteed Lifetime Withdrawal Benefit</BenefitName>
  <ExclusiveBenefit>RIP</ExclusiveBenefit>
  <LinkedProduct>Spousal Highest Daily Lifetime Income v3 (Code: SHDI3)</LinkedProduct>
</SelectedBenefit>

Quick tips to remember:

• Use XPath predicates ([element='value']) to filter nodes based on child values
• Traverse the XML tree with relative paths (e.g., ../../FeatureCode to move up two levels)
• Parameters let you reuse matching logic for different input values

内容的提问来源于stack exchange，提问作者Hitzz91