Re: best-technique for selective group and merge?

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Subject: Re: best-technique for selective group and merge?
From: "G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>
Date: Tue, 02 Mar 2004 16:04:06 -0500

At 2004-03-02 12:38 -0800, James A. Robinson wrote:

That's amazing. Thank you very much for the solution. I think I understand
what is going on, but my grasp of non-procedural languages is minimal
at best.

You're example shows that one can iterate over the unique
element+attribute combinations by excluding any element+attribute which
is not the first instance of the given attribute, right?

Close ... I'm not "excluding any e+a which is not the first" ... I'm using the first of any given e+a combination as the signal to do *all* of the given e+a combination. The <xsl:if> is a trigger of when to do the work, and then I just do the work once with the given criteria. Any subsequent time I do nothing because I assume that I did the work the first time around.

The essence of grouping in XSLT 1.0 is to find a test that is only true once, and then do all the work when that test is true and ignore the work when the test is false. That is the premise of each of axis-based, variable-based and key-based grouping.

I hope this helps.

...................... Ken


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Current Thread
Re: best-technique for selective group and merge?, (continued) G. Ken Holman - Tue, 2 Mar 2004 12:45:15 -0500 (EST) Wendell Piez - Tue, 2 Mar 2004 14:39:24 -0500 (EST) G. Ken Holman - Tue, 2 Mar 2004 15:11:59 -0500 (EST) James A. Robinson - Tue, 2 Mar 2004 15:38:21 -0500 (EST) G. Ken Holman - Tue, 2 Mar 2004 16:05:05 -0500 (EST) <=

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