围绕 xsl:apply-templates 的条件测试

问题描述

我一直在尝试学习如何在 xslt 中编写代码，目前我一直在学习如何围绕 xsl:apply-templates 标签使用条件测试.

I've been trying to learn how to code in xslt and currently am stuck on how to use conditional tests around the xsl:apply-templates tag.

这是我正在测试的 xml.

Here's the xml that I am testing.

<?xml version="1.0" encoding="utf-8"?>
<catalog>
  <cd>
    <title>Empire Burlesque</title>
    <artist>Bob Dylan</artist>
    <country>USA</country>
    <company>Columbia</company>
    <price>10.90</price>
    <year>1985</year>
</cd>
<cd>
    <title>Hide your heart</title>
    <artist>Bonnie Tyler</artist>
    <country>UK</country>
    <company>CBS Records</company>
    <price>9.90</price>
    <year>1988</year>
</cd>
<cd>
    <title>Greatest Hits</title>
    <artist>Dolly Parton</artist>
    <country>USA</country>
    <company>RCA</company>
    <price>9.90</price>
    <year>1982</year>
</cd>

这是我的 xslt

<xsl:template match="/">
  <xsl:apply-templates select="catalog/cd" />
</xsl:template>

<xsl:template match="cd">
  <p>
    <xsl:apply-templates select="artist" />
    <br /> 
    <xsl:apply-templates select="country" />
    <br />
    <xsl:if test="country != 'USA' and year != '1985'">
      <xsl:apply-templates select="year" />
    </xsl:if>
  </p>
</xsl:template>

<xsl:template match="artist">
  <xsl:value-of select="." />
</xsl:template>

<xsl:template match="country">
  <xsl:value-of select="." />
</xsl:template>

<xsl:template match="year">
  <xsl:value-of select="." />
</xsl:template>

这是我的输出:

Bob Dylan
USA

Bonnie Tyler
UK
1988

Dolly Parton
USA

这是我期望的输出:

Bob Dylan
USA

Bonnie Tyler
UK
1988

Dolly Parton
USA
1982

即使我只想在国家/地区的值为 USA 且年份的值为 1985 时删除年份，但每次国家/地区的值为 USA 时都会删除年份.有没有更好的方法可以使用应用模板?

Even though I want to remove the year only when country has a value of USA and year has a value of 1985 it is removing the year every time country has a value of USA only. Is there a better way I can use apply-templates?

推荐答案

您可能更喜欢将模板直接应用于所需的节点集，而无需有条件的if"检查.

You might prefer to apply templates to the wanted node set directly, without conditional "if" check.

<xsl:apply-templates select="year[not(../country='USA' and ../year='1985)]" />

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