[xsl] occurrences and axis

Hi,
I have a problem in creating a list of occurrences.
Here a sample of my file:

<teiCorpus.2>
...
     <div4 type="forma">
      <termEntry id="LCLiNPLi4S9Alt">
     <tig>
    <term grammRef="vat3ips2" type="forma">&apos;un capisci un cazzo</term>
    <ptr type="parlante" target="Li4" />
    <ptr type="domanda" target="S9Alt" />
    <ptr gradRef="dial" type="tipo lessicale" target="NON"/>
    <ptr gradRef="it_co" type="tipo lessicale" target="CAPIRE"/>
      <ptr gradRef="it_co" type="tipo lessicale" target="CAZZO"/>
    <ptr type="area tematica" target="alt" />
         <ptr gradRef="it_co" type="voce" target="stupido"/>
    </tig>
      </termEntry>
     </div4>
...
</teiCorpus.2>

I would like to get all the occurrences (here encoded by the <term> element) included in <tig>, that have a <ptr gradRef="gerg_inn">; is it possible? I think it is the case to match the <tig> element and then to ask for the <term> child element in case the <tig> has a <ptr gradRef='gerg_inn'> child. I've tried in this way:

<xsl:template match="/">
</xsl:template>

<xsl:key name="term" match="term[@type='forma']" use="."/>

<xsl:template match="//tig" name="pippo"> <html> <body> <xsl:if test="child::ptr[gradRef='gerg_inn']"> <xsl:for-each select="child::term[@type='forma'][not(.=preceding::term)]"> <xsl:sort select="."/><br /> <xsl:value-of select="concat(.,' ',count(key('term',.)))"/> <xsl:text> </xsl:text> </xsl:for-each> </xsl:if> </body> </html>

 </xsl:template>
</xsl:stylesheet>

but it is not working... can anyone help me?
Many thanks Elena

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