RE: Multiply Element Values

> Task Breakdown:
> -------------
>   * need to multiply qty and price
>   * for each item in the table
>   * display the result in the table
>   * output of each line multiplied needs to be a number
>   * add all costs to get a total
> 
3 approaches:

1 - do the output of the table and the totalling as two separate operations.
The output is straightforward; for the totalling use a recursive template,
with the following pseudo-code:

template name="process-items"
  param item-list
  if $item-list <!-- is not empty -->
    var first = item-list[1]
    var total-of-rest
       call-template process-items with-param item-list[position()!=1]
    /var
    value-of $first/qty * $first/price + $total-of-rest
/template

2 - use the node-set() extension function (in Saxon and xt): create a result
tree fragment that contains the product of qty and price, convert this to a
node-set, and use the sum() function to get the total.

3 - risk being ostracised by the entire XSL community by using saxon:assign
which allows you to update variables.

Mike Kay


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