version="1.0">

  <xsl:output method="xml"/>

  <xsl:template match='/'>

    <refcheck>

      <xsl:apply-templates select='//xref' mode='missing'/>

      <xsl:apply-templates select='//reference' mode='orphans'/>

      <xsl:apply-templates select='//references[@dwdrfc-type = "norm"]' mode='normcheck'/>

      <xsl:apply-templates select='//xref[@dwdrfc-type = "norm"]' mode='normrefs'/>

    </refcheck>

  </xsl:template>

  <xsl:template match='xref' mode='missing'>

    <xsl:param name='refname'>

      <xsl:value-of select='@target'/>

    </xsl:param>

    <xsl:param name='reftgt'>

      <xsl:value-of select='//*[@anchor = $refname]/@anchor'/>

    </xsl:param>

    <xsl:choose>

      <xsl:when test='$reftgt = $refname'/>

      <xsl:otherwise>

        <missing><xsl:value-of select='$refname'/></missing><xsl:text>

      </xsl:text>

    </xsl:otherwise>

  </xsl:choose>

  </xsl:template>

  <xsl:template match='xref' mode='normrefs'>

    <xsl:param name='refname'>

      <xsl:value-of select='@target'/>

    </xsl:param>

    <xsl:param name='reftgt'>

      <xsl:value-of select='//references[@dwdrfc-type = "norm"]/*[@anchor = $refname]/@anchor'/>

    </xsl:param>

    <xsl:choose>

      <xsl:when test='$reftgt = $refname'/>

      <xsl:otherwise>

        <missing-norm><xsl:value-of select='$refname'/></missing-norm><xsl:text>

      </xsl:text>

    </xsl:otherwise>

  </xsl:choose>

  </xsl:template>

  <xsl:template match='reference' mode='orphans'>

    <xsl:param name='refname'>

      <xsl:value-of select='@anchor'/>

    </xsl:param>

    <xsl:param name='reftgt'>

      <xsl:value-of select='//xref[@target = $refname]/@target'/>

    </xsl:param>

    <xsl:if test='$reftgt != $refname'>

      <orphan><xsl:value-of select='$refname'/></orphan><xsl:text>

    </xsl:text>

  </xsl:if>

</xsl:template>

<xsl:template match='references' mode='normcheck'>

  <xsl:apply-templates mode='normcheck'/>

</xsl:template>

<xsl:template match='*' mode='normcheck'>

  <xsl:param name='refname'>

    <xsl:value-of select='@anchor'/>

  </xsl:param>

  <xsl:param name='reftgt'>

    <xsl:value-of select='//xref[@dwdrfc-type = "norm" and @target = $refname]/@target'/>

  </xsl:param>

  <xsl:if test='$refname != $reftgt'>

    <normchk><xsl:value-of select='$refname'/></normchk><xsl:text>

</xsl:text>

  </xsl:if>

</xsl:template>

<xsl:template match='text()' mode='normcheck'/>

</xsl:stylesheet>