xslt-1.0 - 使用 XPath 选择包含混合内容或仅包含文本的节点

Question

使用 XPath 1.0 和 XSLT 1.0 我需要选择混合内容的直接父级或仅选择文本。考虑以下示例:

<table class="dont-match">
    <tr class="dont-match">
        <td class="match">Mixed <strong class="maybe-match">content</strong> in here.</td>
        <td class="match">Plain text in here.</td>
        <td class="dont-match"><img src="..." /></td>
    </tr>
</table>
<div class="dont-match">
    <div class="dont-match"><img src="..." /></div>
    <div class="match">Mixed <em class="maybe-match">content</em> in here.</div>
    <p class="match">Plain text in here.</p>
</div>

显然 match、maybe-match 和 dont-match 类仅用于演示目的，不能用于匹配。 maybe-match 表示最好不要匹配，但我可以自己解决问题，以防万一很难排除。

非常感谢!

Answer 1

“匹配”使用:

//*[text()[normalize-space()] and not(../text()[normalize-space()])]

对于“可能匹配”使用:

//*[../text()[normalize-space()]]

基于 XSLT 的验证:

<xsl:stylesheet version="1.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:output omit-xml-declaration="yes" indent="yes"/>
 <xsl:strip-space elements="*"/>

 <xsl:template match="/">
     <xsl:copy-of select=
      "//*[text()[normalize-space()] and not(../text()[normalize-space()])]"/>
==========
   <xsl:copy-of select="//*[../text()[normalize-space()]]"/>
 </xsl:template>
</xsl:stylesheet>

当此转换应用于提供的 XML 时(包装到单个顶级元素中以成为格式良好的 XML 文档):

<t>
<table class="dont-match">
    <tr class="dont-match">
        <td class="match">Mixed <strong class="maybe-match">content</strong> in here.</td>
        <td class="match">Plain text in here.</td>
        <td class="dont-match"><img src="..." /></td>
    </tr>
</table>
<div class="dont-match">
    <div class="dont-match"><img src="..." /></div>
    <div class="match">Mixed <em class="maybe-match">content</em> in here.</div>
    <p class="match">Plain text in here.</p>
</div>
</t>

计算两个 XPath 表达式中的每一个并将所选节点复制到输出:

<td class="match">Mixed <strong class="maybe-match">content</strong> in here.</td>
<td class="match">Plain text in here.</td>
<div class="match">Mixed <em class="maybe-match">content</em> in here.</div>
<p class="match">Plain text in here.</p>
==========
   <strong class="maybe-match">content</strong>
<em class="maybe-match">content</em>

正如我们所见，这两个表达式都完全选择了想要的元素。