Re: [xsl] distinguish whether variable holds string or node set

[David Carlisle <davidc@xxxxxxxxx>]

On 13/06/2010 08:51, TW wrote:
> Hi,
>
> 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
> before.
>
> 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
$arg/some/path
without having to test the type, so long as you always pass in a node set.

David