xslt 1.0 - Accessing current node in predicate with xsl:for-each -

i'm stuck finding out how can access current node whilst iterating on collection of nodes xsl:for-each. xml:

<events>     <event>         <date>             <year>2012</year>             <month>july</month>         </date>         <description>...</description>     </event>     <!-- more events --> </events> 

what try achieve html-representation this:

<h2>2012</h2> <dl>     <dt>july</dt>     <dd>one of these every event year=2012 , month=july</dd>      <dt>august</dt>     <!-- ... --> </dl> <h2>2013</h2> <!-- ... --> 

i'm using xpath-expression distinct years , iterate on them calling template called year parameters $year , $events. getting value $year easy, i'm struggling finding right events. following won't work, because . in second predicate refers event being tested predicate. how access year in there?

<xsl:template match="events"> <xsl:for-each select="event[not(date/year=preceding-sibling::event/date/year)]/date/year"> <xsl:call-template name="year">     <xsl:with-param name="year" select="." />     <xsl:with-param name="events" select="event[date/year=.]" /> </xsl:call-template> </xsl:for-each> </xsl:template> 

many in advance!

ps: must work xpath , xslt 1.0.

this transformation:

<xsl:stylesheet version="1.0"  xmlns:xsl="http://www.w3.org/1999/xsl/transform">  <xsl:output omit-xml-declaration="yes" indent="yes"/>  <xsl:strip-space elements="*"/>   <xsl:key name="kyear" match="year" use="."/>   <xsl:key name="keventbymonthyear" match="event"   use="string(date)"/>   <xsl:key name="kmonthbymonthyear" match="month"   use="string(..)"/>   <xsl:key name="kmonthbyyear" match="month"  use="../year"/>   <xsl:template match="/*">   <xsl:for-each select=     "*/date/year             [generate-id() = generate-id(key('kyear', .)[1])]     ">    <h2><xsl:value-of select="."/></h2>    <dl>       <xsl:apply-templates select=       "key('kmonthbyyear', current())            [generate-id()            =             generate-id(key('kmonthbymonthyear',                              string(..)                          )[1]                      )             ]"/>       </dl>   </xsl:for-each>  </xsl:template>   <xsl:template match="month">     <dt><xsl:value-of select="."/></dt>      <xsl:for-each select=     "key('keventbymonthyear', string(current()/..))">      <dd><xsl:value-of select="description"/></dd>     </xsl:for-each>  </xsl:template> </xsl:stylesheet> 

when applied on following xml document:

<events>     <event>         <date>             <year>2012</year>             <month>january</month>         </date>         <description>jan1</description>     </event>     <event>         <date>             <year>2012</year>             <month>january</month>         </date>         <description>jan2</description>     </event>     <event>         <date>             <year>2012</year>             <month>march</month>         </date>         <description>mar1</description>     </event>     <event>         <date>             <year>2012</year>             <month>march</month>         </date>         <description>mar2</description>     </event>     <event>         <date>             <year>2012</year>             <month>march</month>         </date>         <description>mar3</description>     </event>     <event>         <date>             <year>2012</year>             <month>july</month>         </date>         <description>jul1</description>     </event>     <event>         <date>             <year>2012</year>             <month>july</month>         </date>         <description>jul2</description>     </event>     <event>         <date>             <year>2012</year>             <month>september</month>         </date>         <description>sep1</description>     </event>     <event>         <date>             <year>2012</year>             <month>october</month>         </date>         <description>oct1</description>     </event>     <event>         <date>             <year>2012</year>             <month>october</month>         </date>         <description>oct2</description>     </event>     <event>         <date>             <year>2012</year>             <month>november</month>         </date>         <description>nov1</description>     </event>     <event>         <date>             <year>2012</year>             <month>november</month>         </date>         <description>nov2</description>     </event>     <event>         <date>             <year>2012</year>             <month>december</month>         </date>         <description>dec1</description>     </event>     <event>         <date>             <year>2012</year>             <month>december</month>         </date>         <description>dec2</description>     </event>     <event>         <date>             <year>2012</year>             <month>december</month>         </date>         <description>dec3</description>     </event>     <event>         <date>             <year>2013</year>             <month>january</month>         </date>         <description>jan1</description>     </event>     <event>         <date>             <year>2013</year>             <month>january</month>         </date>         <description>jan2</description>     </event> </events> 

produces wanted, correct result:

<h2>2012</h2> <dl>    <dt>january</dt>    <dd>jan1</dd>    <dd>jan2</dd>    <dt>march</dt>    <dd>mar1</dd>    <dd>mar2</dd>    <dd>mar3</dd>    <dt>july</dt>    <dd>jul1</dd>    <dd>jul2</dd>    <dt>september</dt>    <dd>sep1</dd>    <dt>october</dt>    <dd>oct1</dd>    <dd>oct2</dd>    <dt>november</dt>    <dd>nov1</dd>    <dd>nov2</dd>    <dt>december</dt>    <dd>dec1</dd>    <dd>dec2</dd>    <dd>dec3</dd> </dl> <h2>2013</h2> <dl>    <dt>january</dt>    <dd>jan1</dd>    <dd>jan2</dd> </dl> 

explanation:

proper use of muenchian method grouping -- composite grouping keys.