[xsl] Getting ordering info from a lookup table

Subject: [xsl] Getting ordering info from a lookup table
From: "Trevor Nicholls" <trevor@xxxxxxxxxxxxxxxxxx>
Date: Tue, 31 Oct 2006 12:29:55 +1300

My transform is using an external XML file as a lookup table. Among other
things, the external file contains a list:

Each time the transform runs, the input XML file corresponds to one of the
<doc> elements in the lookup file. The input file name is passed in as a
parameter to the transformation.

  <xsl:param name="myself" />

I think the following construction can do the lookup to the external file
and locate the current doc:

  .. select="document('lookup.xml')/files/doc[. = $myself]"

but of course this is pointless by itself as I already have the doc name.
What I actually want is to obtain the names of the previous and next docs -
if they exist. There's surely an elegant way to do this, but I don't know
it. What can I do?


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