[xsl] sum of the evaluated values

Subject: [xsl] sum of the evaluated values
From: Al Yurov <alml@xxxxxxxx>
Date: Thu, 22 Nov 2001 13:02:28 +0300

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?

Best regards,

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