RE: params - keys? how to calculate product of parents

The first part, dividing the two (so-called) attributes is easy:

RECORDITEM[@sqlsource='oldshares'] div RECORDITEM[@sqlsource='newshares'] 

The next bit is more difficult. There's no built-in function (like sum())
that takes the product of a set of numbers, but Dimitre's FXSL library makes
it very easy to define one of your own. If he's listening, I'm sure he'll
tell you how. 

The alternative is to do a recursive scan of the values: write a template
(or XSLT 2.0 function) that takes a RECORDSECTION as an argument and the
product-so-far as a second argument. Compute the value above, multiply it by
the product-so-far, and call the template with the following-sibling
RECORDSECTION and the new product as the arguments. Start the thing off by
calling this template/function with the first RECORDSECTION and the value 1
as arguments, terminate the recursion when there are no following siblings.

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


 

> -----Original Message-----
> From: Whitney, Dan (CanWest Interactive) 
> [mailto:DWhitney@xxxxxxxxxxx] 
> Sent: 13 April 2005 13:58
> To: 'mulberry - xsl'
> Subject:  params - keys? how to calculate product of 
> parents with multiple children
> 
> 
> Hi am having trouble conceptualizing how/if I can calculate 
> the following:
> I want to take the children of RECORDSECTION and divide 
> attribute value
> newshares by attribute value oldshares.
> I then want to multiply the results of each those 
> calculations (there may be
> 0 - any number of occurrences of RECORDSECTION). So for below 
> it would be:
> (1/2)*(1/2)= 0.25
> 
> Any help/examples would be appreciated.
> 
> Dan Whitney
> 
> XML
> 
> <?xml version="1.0" encoding="windows-1252"?>
> <?xml-stylesheet type="text/xsl" href="test/split_total.xsl"?>
> 
> <PUBLICATION>
> <DOCUMENT source="splits" group="surveys" output="body">
> <RECORD fragment="splits" recid="12129" fragid="13" product="surveys"
> group="surveys" status="1"><ID idtype="fpid">12129</ID>
> <RECORDSECTION docfragment="splits">
> <RECORDITEM sqlsource="oldshares">2</RECORDITEM>
> <RECORDITEM sqlsource="newshares">1</RECORDITEM>
> </RECORDSECTION>
> <RECORDSECTION docfragment="splits">
> <RECORDITEM sqlsource="oldshares">2</RECORDITEM>
> <RECORDITEM sqlsource="newshares">1</RECORDITEM>
> </RECORDSECTION>
> </RECORD>
> </DOCUMENT>
> </PUBLICATION>
> 
> XSL
> 
> <xsl:stylesheet
>     version="1.0"
>     xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
> 
> <xsl:output
>     method="html"
>     encoding="iso-8859-1"
>     indent="yes"
>     version="4.0"/>
> 
> 
> <xsl:template match="PUBLICATION">
>   <table border="0" cellpadding="2" cellspacing="2" 
> width="410" cols="2" >
>     <tr>
>       <td>
>       <xsl:for-each select="DOCUMENT/RECORD">
> <!-- below would like to only define param once but have it 
> increment based
> on position-->
>         <xsl:variable name="product[position()]"
> select="RECORDSECTION[1]/RECORDITEM[@sqlsource='newshares'] div
> RECORDSECTION[1]/RECORDITEM[@sqlsource='oldshares']"/>
>         <xsl:variable name="product[position()]"
> select="RECORDSECTION[2]/RECORDITEM[@sqlsource='newshares'] div
> RECORDSECTION[1]/RECORDITEM[@sqlsource='oldshares']"/>
> <!-- this was a half conceived attempt
>         <xsl:for-each select="RECORDSECTION[1]">
>           <xsl:call-template name="splitfactor">
>             <xsl:with-param name="factor-subset"
> select="following-sibling::RECORDSECTION"/>
>           </xsl:call-template>)
>         </xsl:for-each>
> -->
> <!-- here don't even know how I would write this -->
>         <xsl:value-of select="$product1 * $product2"/>
>       </xsl:for-each>
>       </td>
>     </tr>
>   </table>
> </xsl:template>
> 
> <!-- half conceived attempt -->
> <xsl:template name="splitfactor">
>   <xsl:param name="factor-subset" select="1"/>
>   <xsl:if test="$factor-subset[1]">
>     <xsl:call-template name="splitfactor">
>       <xsl:with-param name="factor-subset" 
> select="$factor-subset[position()
> &gt; 1]"/>
>     </xsl:call-template>
>   </xsl:if>		
> </xsl:template>
> 
> <xsl:template match="ID"/>
> 
> </xsl:stylesheet>