[xsl] Simplify HAIRY xslt

[Marcus Andersson <marcus@xxxxxxxxxx>]

I have this stylesheet that generates another stylesheet based on some 
XML that contains some XPaths that should get evaluated on the next pass 
and also generate some other stuff like absolute XPaths. The code I have 
works but is extremely hairy and also duplicates some code.

I provide the template that does the duplication in hope that someone 
can help me. The structures inside the res:when and the res:otherwise 
are identical apart from the content of the uid attribute. I'll be glad 
to provide you with more info if you need.

  <xsl:template name="rule">
    <xsl:param name="uri"/>
    <xsl:variable name="prefix" select="../@prefix"/>

    <res:choose>
      <res:when test="*[name() = '{$prefix}:rule']">
        <xsl:element name="{$prefix}:rule" namespace="{$uri}">
          <xsl:if test="string(@display)">
            <xsl:attribute name="displayValue">{<xsl:value-of 
select="@display"/>}</xsl:attribute>
          </xsl:if>
          <xsl:attribute name="uid">{*[name() = '<xsl:value-of 
select="$prefix"/>:rule']/@uid}</xsl:attribute>
          <xsl:attribute name="xpath">{$newXpath}</xsl:attribute>
          <xsl:attribute name="type">{$type}</xsl:attribute>
          <xsl:copy-of select="@*|node()"/>
        </xsl:element>
      </res:when>
      <res:otherwise>
        <xsl:element name="{$prefix}:rule" namespace="{$uri}">
          <xsl:if test="string(@display)">
            <xsl:attribute name="displayValue">{<xsl:value-of 
select="@display"/>}</xsl:attribute>
          </xsl:if>
          <xsl:attribute name="uid">{generate-id()}_<xsl:value-of 
select="$prefix"/></xsl:attribute>
          <xsl:attribute name="xpath">{$newXpath}</xsl:attribute>
          <xsl:attribute name="type">{$type}</xsl:attribute>
          <xsl:copy-of select="@*|node()"/>
        </xsl:element>
      </res:otherwise>
    </res:choose>

  </xsl:template>

Sorry about the long lines.

Thanks

/Marcus