RE: [xsl] sum of the evaluated values

Subject: RE: [xsl] sum of the evaluated values
From: "Michael Kay" <michael.h.kay@xxxxxxxxxxxx>
Date: Thu, 22 Nov 2001 10:46:32 -0000
> i have xml:
>   <event type="1" time="3:00">
>   <event type="0" time="2:00">
>   <event type="1" time="4:00">
>   <event type="1" time="5:00">
> and i need sum of the minutes: number(substring-before(@time,':'))
> only where @type=1.
> How it can  be done?
The only way to sum over a computed value in pure XSLT 1.0 is to write a
recursive named template.

Alternatives if you're prepared to use extensions:

(a) construct a result tree fragment holding the actual values you want to
sum, and then use the sum() function on the nodes in this RTF (this will
need the xx:node-set() extension

(b) use an extension function such as

   saxon:sum(event/time, saxon:expression(substring-before(.,':'))

Mike Kay

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