Re: [xsl] group-by an optional attribute

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Subject: Re: group-by an optional attribute
From: "G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>
Date: Tue, 22 Nov 2011 13:03:03 -0500

At 2011-11-22 18:22 +0100, Martin Honnen wrote:

Mark wrote:

I tried to formulate an alternative, thinking this would group-by the
true value of @line were it present, or by zero in its absence, but it
fails:
<xsl:for-each-group select="current-group()" group-by="if(Stamp/@line)
then Stamp/@line else 0">


Can you post details as to why exactly this fails? Do you get an error? Does
  group-by="if (Stamp/@line) then number(Stamp/@line) else 0"
work better?

Whenever I have the expression "if ( x ) then x else y" and x is a node, as can be used in this example, I use:

(x,y)[1]

... which in your example translates to:

group-by="number((Stamp/@line,0)[1])"

I hope this helps.

. . . . . . . . . . Ken

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Current Thread
group-by an optional attribute Mark - 22 Nov 2011 17:12:54 -0000 Martin Honnen - 22 Nov 2011 17:23:06 -0000 G. Ken Holman - 22 Nov 2011 18:03:45 -0000 <= Mark - 22 Nov 2011 18:34:02 -0000 David Carlisle - 22 Nov 2011 21:56:48 -0000 Mark - 23 Nov 2011 00:37:58 -0000 David Carlisle - 22 Nov 2011 17:23:47 -0000

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