如何在XSLT中解析CDATA元素中的XML DOM？

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="2.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:my="http://example.com/my"
  exclude-result-prefixes="my">

  <my:parse-cdata>
    <xsl:function name="my:parse-cdata">
      <xsl:param name="cdata-element" as="element()" />
      <xsl:analyze-string select="$cdata-element"
        regex="{concat('^(', string-join(names(@), '|'), ')')}">
        <xsl:matching-substring>
          <xsl:value-of select="." />
        </xsl:matching-substring>
        <xsl:non-matching-substring>
          <xsl:text>ERROR: Unknown CDATA element: </xsl:text>
          <xsl:value-of select="." />
        </xsl:non-matching-substring>
      </xsl:analyze-string>
      <xsl:value-of select="my:parse-cdata-element()" />
    </xsl:function>
  </my:parse-cdata>

  <xsl:template match="*">
    <xsl:variable name="cdata-element" select="my:parse-cdata(substring-before(current(), ']]'))" />
    <xsl:choose>
      <xsl:when test="$cdata-element">
        <xsl:element name="{$cdata-element}">
          <xsl:value-of select="my:parse-cdata-element()" />
        </xsl:element>
      </xsl:when>
      <xsl:otherwise>
        <xsl:apply-templates select="." />
      </xsl:otherwise>
    </xsl:choose>
  </xsl:template>

  <xsl:template match="text()">
    <xsl:value-of select="." />
  </xsl:template>

</xsl:stylesheet>