How to use xpath in this xml file...

Hi everybody,

I have a xml file like this:

<PENSIONES>
        <NOMBRE>28509599H</NOMBRE>
        <numCol>1</numCol>
        <Volver>0</Volver>
        <CIF>P4100000A</CIF>
        <RAZONSOCIAL>DIPUTACION PROVINCIAL DE SEVILLA</RAZONSOCIAL>
        <TOTAL_APORT_EMP>4.640,55</TOTAL_APORT_EMP>
        <TOTAL_APORT_TRAB>1.969,44</TOTAL_APORT_TRAB>
        <accion>listadoPensiones</accion>
        <desde>1</desde>
        <DETALLE_PENSION>
                <ANNO>1998</ANNO>
                <MES>4</MES>
                <APORT_EMP>1.514,55</APORT_EMP>
                <APORT_TRAB>0</APORT_TRAB>
        </DETALLE_PENSION>
        <DETALLE_PENSION>
                <ANNO>1998</ANNO>
                <MES>5</MES>
                <APORT_EMP>42,07</APORT_EMP>
                <APORT_TRAB>8,41</APORT_TRAB>
        </DETALLE_PENSION>
        <DETALLE_PENSION>
                <ANNO>1998</ANNO>
                <MES>6</MES>
                <APORT_EMP>42,07</APORT_EMP>
                <APORT_TRAB>8,41</APORT_TRAB>
        </DETALLE_PENSION>
        <DETALLE_PENSION>
                <ANNO>1998</ANNO>
                <MES>7</MES>
                <APORT_EMP>42,07</APORT_EMP>
                <APORT_TRAB>8,41</APORT_TRAB>
        </DETALLE_PENSION>
        <DETALLE_PENSION>
                <ANNO>1998</ANNO>
                <MES>8</MES>
                <APORT_EMP>42,07</APORT_EMP>
                <APORT_TRAB>8,41</APORT_TRAB>
        </DETALLE_PENSION>
        <DETALLE_PENSION>
                <ANNO>1998</ANNO>
                <MES>9</MES>
                <APORT_EMP>42,07</APORT_EMP>
                <APORT_TRAB>8,41</APORT_TRAB>
        </DETALLE_PENSION>
        <hasta>70</hasta>
        <registros>71</registros>
</PENSIONES>

 When i select value of "ANNO" with xsl, i would like compare with last value 
of ANNO. I have trying with precedence,ancestor,position(), but i have failled. 
Which xpath sentence will be good in this case?

Thanks in advance and Greetings from Spain


 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list