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RE: Non-existing node
- To: <xsl-list at lists dot mulberrytech dot com>
- Subject: RE: [xsl] Non-existing node
- From: "Michael Kay" <mhkay at iclway dot co dot uk>
- Date: Mon, 17 Sep 2001 09:06:53 +0100
- Reply-To: xsl-list at lists dot mulberrytech dot com
> I have a (stupid?) question:
>
> What is returned when you try to reach a node that doesn't exist ?
If you reference a node that doesn't exist, the result is an empty node-set.
> Imagine the simplest xml possible:
>
> <xml></xml>
Actually that's far from simple; it's highly debatable whether or not this
is well-formed XML, since the XML specification states that names beginning
with "xml" are reserved for future standardisation...
>
> what I would like to know is what value is returned if I try
> to reach some
> node inside the xml, thus is:
>
> ...
> <xsl:if test="SomeNode=Whatever">
> ...
> </xsl:if>
> ...
>
The rules for "=", "!=", etc, mean that if you compare an empty node-set to
anything, using any of the six comparison operators, the result is false. In
fact, comparing two empty node-sets to each other also gives false.
Mike Kay
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