Hello guys!

I have to enumerate nodes in the document-flow order using xslt 1.0. I
thought that's not difficult but the following template does nothing.
Can you help me?

   <xsl:template match="node()">
      <xsl:param name="counter" select="0"/>
      <xsl:copy>
         <xsl:apply-templates select="@*"/>
         <xsl:attribute name="new_id" select="concat('item_', $counter)"/>
         <xsl:apply-templates select="occurrence/art">
            <xsl:with-param name="counter" select="$counter+1"/>
         </xsl:apply-templates>
      </xsl:copy>
   </xsl:template>

Without sample input or output XML it's difficult to give a good
answer, but its likely <xsl:number count="*" level="any"/> will give
you the numbering you're after.

cheers
andrew