Re: [xsl] duplicate removal

Subject: Re: [xsl] duplicate removal
From: Jeni Tennison <jeni@xxxxxxxxxxxxxxxx>
Date: Mon, 19 Nov 2001 12:48:37 +0000
Hi Dave,

> This finds all the duplicate cat-num entries. The processing model
> doesn't however, allow me to identify if the first one has different
> bibno child to the others, which is what I need.
> Any suggestions for an alternative to the apply-templates above,
> which would allow me to check if each one had the same bibno child
> as the first?

Well, you could find all the rs with unique cat-nums, iterate through
them and for each of them get all the rs with that cat-num:

  <xsl:for-each select="r[cat-num and
                          generate-id() =
    <xsl:sort select="cat-num" />
    <xsl:variable name="bibno" select="bibno" />
    <xsl:variable name="rs" select="key('multiBooks', cat-num)" />

Then you can find those rs with the same cat-num whose bibno is not
the same as the bibno of the first one with::

  $rs[bibno != $bibno]

(Of course you might get several rs with the same bibno returned by
this, but you said you just wanted to know whether they were different
from the first one, so I guess that's what you want. Otherwise, you
need to do multiple-grouping.)



Jeni Tennison

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