Get a Count Parents - Please!

Hi all,

How I get a count of parent's elements?
This is my xml:

<XML>
   <PRODUCAO>
        <TRABALHOS>
              <TRABALHO>1</TRABALHO>
              <TRABALHO>2</TRABALHO>
              <TRABALHO>3</TRABALHO>
        </TRABALHOS>
        <ARTIGOS>
            <ARTIGO>1</ARTIGO>
            <ARTIGO>2</ARTIGO>
            <ARTIGO>3</ARTIGO>
        </ARTIGOS>
   </PRODUCAO>
</XML>

I want to get a count of my previous elements.
Example:

<xsl:template match="ARTIGO">
     <xsl:value-of select="count of 'TRABALHO' elements"/>
</xsl:template>

I try so:
<xsl:value-of select="parent::*/parent::*/preceding-sibling::*"/>
But this isn't work.

Cheers,

Paulo.


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