XSL Param or Attribute?

[TechGlider]

I need some help creating a dynamic variable..

I need to set up a variable that you can add to:

Can something like this be done --> This will be a for-each clause which will be looping through each set of node finding a child node, lets just say named = "amount"

so for example:

<account>
    <name />
    <account_number />
    <amount> x </amount>
</account>

<xsl:variable name="current_value">0</xsl:variable>

<xsl:for-each select="/account">
   
    <xsl:value-of select="$current_value + amount" /> <!-- i need this amount to be set to the current_value of this value --> 
         
</xsl:for-each>

What i need to is set up a dynamic variable like this " current_value = current_value + amount "

So every time it goes through and hits the node amount it adds it to the current_value?

[TechGlider]

Ok so i found out you cannot alter the value of global values, so that theory is shot.. But no i am wondering if i can do something like this...

<xsl:value-of select="sum(AMOUNT[position() &lt;= current()]/AMOUNT)" />

Where i get the position of the previous node and make add it to the current node.. and i will just do a null check since the first node may get a null value?

What i am looking to do here is a running Total.

[TechGlider]

Figured it out.. For those of you interested on how to do a running total.... Here it is

//Declare the variable
<xsl:variable name="position" select="position()"/>

<xsl:value-of select="sum(//ACCOUNT[position() &lt;= $position]/AMOUNT)" />

[oesxyl]

this is a general implementation using exslt.

xml:

<?xml version="1.0"?>
<base>
  <item>
    <amount>1</amount>
    <check>yes</check>
  </item>
  <item>
    <amount>2</amount>
    <check>yes</check>
  </item>
  <item>
    <amount>3</amount>
    <check>yes</check>
  </item>
  <item>
    <amount>4</amount>
    <check>yes</check>
  </item>
  <item>
    <amount>5</amount>
    <check>yes</check>
  </item>
  <item>
    <amount>6</amount>
    <check>yes</check>
  </item>
  <item>
    <amount>7</amount>
    <check>yes</check>
  </item>
  <item>
    <amount>8</amount>
    <check>yes</check>
  </item>

</base>

xslt:

<?xml version="1.0"?>
<xsl:stylesheet version="1.0"
		xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
		xmlns:f="http://exslt.org/functions"
		extension-element-prefixes="f">

  <xsl:output method="xml"
	      indent="yes"/>

  <xsl:template match="/">
    <values>
      <xsl:apply-templates select="*//amount"/>
      <sum>
	<xsl:value-of select="f:sum(*//amount)"/>
      </sum>
    </values>
  </xsl:template>

  <xsl:template match="amount">
    <val>
      <xsl:value-of select="."/>
    </val>
  </xsl:template>

  <f:function name="f:sum">
    <xsl:param name="mynodeset"/>
    <xsl:variable name="first"
		  select="$mynodeset[1]"/>
    <xsl:variable name="rest"
		  select="$mynodeset[position() > 1]"/>
    <xsl:choose>
      <xsl:when test="$rest">
	<f:result select="$first + f:sum($rest)"/>
      </xsl:when>
      <xsl:otherwise>
	<f:result select="$first"/>
      </xsl:otherwise>
    </xsl:choose>
  </f:function>

</xsl:stylesheet>

see also:

http://exslt.org/func/index.html

best regards