xslt:赋值变量等于两种情况之一

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:template match="/">
    <xsl:variable name="myVariable">
      <xsl:choose>
        <xsl:when test="condition1">
          <xsl:value-of select="'Value1'" />
        </xsl:when>
        <xsl:when test="condition2">
          <xsl:value-of select="'Value2'" />
        </xsl:when>
        <xsl:otherwise>
          <xsl:value-of select="'DefaultValue'" />
        </xsl:otherwise>
      </xsl:choose>
    </xsl:variable>
    <result>
      <xsl:value-of select="$myVariable" />
    </result>
  </xsl:template>
</xsl:stylesheet>