Sum & Sort & Maxvalue

Hello

I have a complex problem. I dont know if i can explain it correctly. 

First, i have the following code:

xml
----------------------------------------

<day date="01.03.2004">
   <users>1</users>
   <gv name="Offerte Neu">
      <hits>2</hits>
      <activity name="Ermittlung eines Produktes">
         <hits>2</hits>
      </activity>
   </gv>
   <gv name="SimulatorWeb">
      <hits>1</hits>
      <activity name="SimulatorDummy">
         <hits>1</hits>
      </activity>
      <activity name="Ermittlung eines Produktes">
         <hits>3</hits>
      </activity>
   </gv>
   <gv name="CIS">
      <hits>1</hits>
      <activity name="Vertrags Anzeige">
         <hits>1</hits>
      </activity>
      <activity name="Vertrags Suche">
         <hits>1</hits>
      </activity>
   </gv>
   <gv name="Muster">
      <hits>11</hits>
      <activity name="Muster">
         <hits>11</hits>
      </activity>
   </gv>
   <gv name="Mahninfo">
      <hits>1</hits>
      <activity name="Mahninfo">
         <hits>1</hits>
      </activity>
   </gv>
</day>
<day date="02.03.2004">
   <users>2</users>
   <gv name="Offerte Neu">
      <hits>3</hits>
      <activity name="Erfassung Produktedaten">
         <hits>1</hits>
      </activity>
      <activity name="Ermittlung eines Produktes">
         <hits>3</hits>
      </activity>
   </gv>
   <gv name="Mahninfo">
      <hits>3</hits>
      <activity name="Mahninfo">
         <hits>3</hits>
      </activity>
   </gv>
</day>
----------------------------------------

xsl
----------------------------------------
<xsl:for-each select="//day">
	<xsl:variable name="day" select="."/>
	<xsl:value-of select="normalize-space($day/@date)
		<xsl:for-each select="//gv/activity[generate-id()=generate-id(key('activity_key',@name))]">
			<xsl:variable name="uname" select="@name"/>
			<xsl:variable name="activity" select="$day/gv/activity[@name=$uname]/@name"/>
			<xsl:variable name="summe" select="sum($activity/../..//activity[@name=$uname]/hits)"/>
			<xsl:sort data-type="number" order="descending">	
				<xsl:value-of select="$summe"/>
			</xsl:sort>
			<xsl:if test="$summe>0">
				<xsl:value-of select="$activity"/>
				<b><xsl:value-of select="$summe"/></b>
				</xsl:if>
		</xsl:for-each>
</xsl:for-each>
----------------------------------------

My goal is the following sorted list of activities during a day:

----------------------------------------
01.03.2004
Muster 11
Ermittlung eines Produktes 5
Mahninfo 1
SimulatorDummy 1
Vertrags Anzeige 1
Vertrags Suche 1

03.03.2004
Muster 4
Ermittlung eines Produktes 2
Mahninfo 2
Aufbereitung Offerte 1
Erfassung Produktedaten 1
CIS 1
----------------------------------------

The xsl-script doesnt work properly. The result is this

----------------------------------------
01.03.2004
Muster	11
Ermittlung eines Produktes 5
SimulatorDummy	1
Vertrags Anzeige 1
Vertrags Suche	1
Mahninfo 1

03.03.2004
Ermittlung eines Produktes 4
Aufbereitung Offerte 2
Erfassung Produktedaten	3
----------------------------------------

The problem is, that i have to list every activity only one time although the same activity is in several gv-tags.

Probably someone could help me.

The next problem is to get the maximum-value of the activity-hits. I have a recursive template with i can get the maximum value of a list. Thats no problem. But now there's another situation. I first have to sum-up all the hits of one activity and then i could get the maximum of all the sum-up hits.

Someone understand anything and have a solution for my problems?

Kindly regards
Florian Mueller

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