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Re: distinguish whether variable holds string or node

Subject: Re: distinguish whether variable holds string or node set
From: David Carlisle <davidc@xxxxxxxxx>
Date: Sun, 13 Jun 2010 10:51:02 +0100
Re:  distinguish whether variable holds string or node
On 13/06/2010 08:51, TW wrote:

sorry for the messed up message I sent from my other mail account.  I
should have known that it wouldn't work as I experienced this issue

Is there a way to determine whether a variable holds a string or a
node set? Something like:

no in xslt 1 all you can do is a static analysis of all teh places where your template is called and see if it is called with the smae type always.

<xsl:template name="my-template"> <xsl:param name="arg"/>
Note that makes the default value an epty string which is dangerous if the value passed in is going to be a node set and you want to do $arg/some/path. Safer is to declare it as
<xsl:param name="arg" select="/.."/>
so the default value is a (empty) node set and then it is safe to do
without having to test the type, so long as you always pass in a node set.


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