[xsl] Grouping problem?

["Benjamin Farrow" <lovinjess@xxxxxxxxxxx>]

All,
 I don't know how to explain my problem in words very concisely, so I'll 
try with a simplified example.

SourceXML:
<root>
 <ele sum="3"/>
 <ele sum="4"/>
 <ele sum="2"/>
 <ele sum="10"/>
 <ele sum="7"/>
 <ele sum="5"/>
 <ele sum="1"/>
 <ele sum="2"/>
</root>

Desired Output:
<root>
 <ele sum="3"/>
 <ele sum="4"/>
 <ele sum="2"/>
 <br/>          <!-- next element makes total greater than 10 -->
 <ele sum="10"/>
 <br/>          <!-- next element makes total greater than 20 -->
 <ele sum="7"/>
 <br/>          <!-- next element makes total greater than 30 -->
 <ele sum="5"/>
 <ele sum="1"/>
 <ele sum="2"/>
</root>

I'm trying to break apart the ele element when the sum total of preceding 
siblings and self is greater than the increment of 10 by putting an element 
to denote the break.

I've tried some crazy tests with mod and div and I've looked over the 
Muenchian grouping, but I still can't come up with a way to arbitrarily set 
the break points.  I know there is a solution and I get close, but I just 
can't get around it.

Here is my template (also have the standard identity template) with which 
I'm trying to get this working.  I just can't figure out the if test for 
this though.

XSL:
 <xsl:template match="ele">
   <xsl:variable name="sum" 
select="sum(preceding-sibling::ele/@sum|@sum)"/>
   <xsl:if test="$sum &gt; (floor($sum div 10) * 10)">
     <br/>
   </xsl:if>
   <xsl:copy>
     <xsl:apply-templates select="node()|@*"/>
   </xsl:copy>
 </xsl:template>

Thanks in advance,
 Benjamin


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