testing for presence of a variable

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Subject: testing for presence of a variable
From: Bruce D'Arcus <bdarcus@xxxxxxxxx>
Date: Fri, 6 May 2005 18:59:30 -0400

Is there a way I can condition a variable on the presence (or absence) of another variable?

I have a crucial global variable in my stylesheets which goes through a document a collects all the citation references. This works well when I have self-contained documents. However, in the case of the manuscript I just finished, I needed to first include the individual chapters into a variable, and then run the stylesheets on that.

To get it to work thus required adding the $chapters variable to the path.

<xsl:variable name="citerefs" select="($chapters)//db:biblioref/@linkend"/>

If I then run the stylesheets on a standalone document that doesn't include this variable, it fails.

So I'm wanting to do something like this:

<xsl:variable name="root-node" select="if ($chapters) then ($chapters) else ()"/> <xsl:variable name="citerefs" select="($root-node)//db:biblioref/@linkend"/>

... but get an error about the missing $chapters.

Any suggestions?

Bruce

Current Thread
testing for presence of a variable Bruce D'Arcus - 6 May 2005 23:04:03 -0000 <= David Carlisle - 6 May 2005 23:22:43 -0000 Bruce D'Arcus - 7 May 2005 00:08:46 -0000

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RE: minor grouping issue, Michael Kay	Thread	Re: testing for presence of a, David Carlisle
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