XSLT: XPath

<xsl:stylesheet ... > 
<xsl:template  match =" * " >
  <xsl:copy>
    <xsl:apply-templates />
  </xsl:copy>
</xsl:template>
<xsl:template match=" thought " >
  <xsl:copy>
    <title><xsl:value-of  select =" title " /><title>
  <xsl:apply-templates  select =" author " />
  <body><xsl:value-of select=" body " /><body>
</xsl:copy>
</xsl:template>
<xsl:template match=" author " >
  <xsl:copy>
   <xsl:text>The author is: </xsl:text>
   <xsl:value-of select=" . " />
  </xsl:copy>
</xsl:template>
</xsl:stylesheet>