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RE: [xsl] for-each and summing based on group


Subject: RE: [xsl] for-each and summing based on group
From: "Michael Kay" <mike@xxxxxxxxxxxx>
Date: Wed, 5 Jan 2005 19:31:51 -0000

If you want maximum compatibility when running a 1.0 stylesheet under a 2.0
processor, leave the code completely unchanged - i.e. leave version="1.0".
If you change it to say version="2.0" then you get more rigorous
type-checking: this won't allow implicit type conversions such as comparing
a string to an integer. In this example you have to change the code to make
it clear whether you want the integer converted to a string or vice-versa.

Michael Kay
http://www.saxonica.com/  

> -----Original Message-----
> From: dmitrik@xxxxxxxxxxxxxx [mailto:dmitrik@xxxxxxxxxxxxxx] 
> Sent: 05 January 2005 19:12
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: RE: [xsl] for-each and summing based on group
> 
> during a quick online search didn't see any example:
> 
> does 1.0 just change to 2.0 in the following?
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <xsl:stylesheet
>    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
>    version="1.0">
> 
> 
> 
> -----Original Message-----
> From: Michael Kay <mike@xxxxxxxxxxxx>
> Sent: Jan 5, 2005 1:26 PM
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: RE: [xsl] for-each and summing based on group
> 
> > When changing the xsl from 1.0 to 2.0 there 
> > were errors.
> > Is it simpler to do that, or use Muenchian grouping for the 
> Customer?
> 
> If you were saying that a stylesheet that worked under 1.0 
> didn't work under
> a 2.0 processor, then this is unusual and it would be nice to know the
> details.
> 
> Michael Kay
> http://www.saxonica.com/
> 
> > 
> > 
> > <xsl:for-each select="Trade">
> > 
> > <xsl:sort select="Customer"/> 
> > 
> > <tr class="r{position() mod 2}">
> > 
> > <td><xsl:value-of select="Customer"/> </td>
> > 
> > <td><xsl:value-of select="TradeId"/><xsl:text/></td>
> > 
> > <td><xsl:value-of select="Type"/><xsl:text/></td>
> > 
> > <td align="right">
> > <xsl:value-of select="format-number(sum(Step
> >    
> > [concat(substring(MinFlowDate,7),substring(MinFlowDate,1,2),su
> > bstring(MinFlowDate,4,2))>=
> > concat(substring($global,7),substring($global,1,2),substring($
> > global,4,2))]
> >    
> > [concat(substring(MinFlowDate,7),substring(MinFlowDate,1,2),su
> > bstring(MinFlowDate,4,2))<
> > concat(substring($global,7)+3,substring($global,1,2),substring
> > ($global,4,2))]
> >    /StepCharge)+ sum(Step
> >    
> > [concat(substring(MinFlowDate,7),substring(MinFlowDate,1,2),su
> > bstring(MinFlowDate,4,2))>=
> > concat(substring($global,7),substring($global,1,2),substring($
> > global,4,2))]
> >    
> > [concat(substring(MinFlowDate,7),substring(MinFlowDate,1,2),su
> > bstring(MinFlowDate,4,2))<
> > concat(substring($global,7)+3,substring($global,1,2),substring
> > ($global,4,2))]
> >    /StepSetoff)  , '###,###,##0')"/>
> > </td>
> > 
> > </xsl:for-each>
> > 
> > Thanks,
> > Dmitri
> > 
> > -----Original Message-----
> > From: Michael Kay <mike@xxxxxxxxxxxx>
> > Sent: Jan 5, 2005 4:50 AM
> > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> > Subject: RE: [xsl] for-each and summing based on group
> > 
> > First read up about standard grouping techniques such as 
> > Muenchian grouping
> > at http://www.jenitennison.com/xslt/grouping
> > 
> > Computing a subtotal for each group is then a minor variant of the
> > technique: instead of merely iterating over the items in the 
> > group using
> > xsl:for-each, you can assign the node-set comprising the group to a
> > variable, and then sum over that using the sum() function.
> > 
> > Like all grouping problems, it's much easier in 2.0:
> > 
> > <xsl:for-each-group select="rows" group-by="columnA">
> >   <xsl:apply-templates select="current-group()"/>
> >   <subtotal><xsl:value-of 
> > select="sum(current-group()/columnB)"/></subtotal>
> > </xsl:for-each-group>
> > 
> > Michael Kay
> > http://www.saxonica.com/ 
> > 
> > > -----Original Message-----
> > > From: dsk [mailto:dmitrik@xxxxxxxxxxxxxx] 
> > > Sent: 05 January 2005 04:09
> > > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> > > Subject: [xsl] for-each and summing based on group
> > > 
> > > 
> > > within a for-each there might be various sets of values which 
> > > produce the 
> > > following grid, where val is equal to a number
> > > 
> > > a  val val val
> > > a  val val val
> > > a  val val val
> > > b  val val val
> > > b  val val val
> > > c  val val val
> > > c  val val val
> > > 
> > > what is the best way to insert a sum line for the first
> > > column a, one for b, and one for c.
> > > 
> > > is a nested for each needed? or checking to see if the 
> > > following value is 
> > > not equal to the preceding, then then summing?
> > > 
> > > thanks,
> > > Dmitri
> > > 
> > > ---
> > > Outgoing mail is certified Virus Free.
> > > Checked by AVG anti-virus system (http://www.grisoft.com).
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