Re: [solved]Generating a tree

Problem solved.

Something like this made it work (you're welcome if you have some 
suggestion to simplify or optimize) :
<xsl:template name="pageNav">
  <xsl:param name="targetNode"/>
  <xsl:param name="currentNode"/>
  <div class="sectionNav">
    <xsl:for-each select="$currentNode/section|$currentNode/page">
      <li>
        <a href="{$url}?page={(_at_)name}">
          <xsl:value-of select="@title"/></a>
        <xsl:if test=". = $targetNode/ancestor-or-self::section">
          <ul>
            <xsl:call-template name="pageNav">
              <xsl:with-param name="targetNode" select="$targetNode"/>
              <xsl:with-param name="currentNode" select="."/>
            </xsl:call-template>
          </ul>
        </xsl:if>
      </li>
    </xsl:for-each>
  </div>
</xsl:template>

/Marcus