RE: Non-existing node

Frank,
<xsl:apply-templates select="Parent[not(MyNode)] />

Ciao Chris

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> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Casadome, Francisco Javier
> Sent: 17 September 2001 09:55
> To: 'xsl-list@xxxxxxxxxxxxxxxxxxxxxx'
> Subject: RE:  Non-existing node
> 
> 
> 
> > If you reference a node that doesn't exist, the result is an empty
> node-set.
> 
> I completely agree :)
> 
> > 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...
> 
> You got me there... I didn't mean to use "xml" by any 
> particular reason I was just trying to make it as general as 
> possible :)
> 
> > 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.
> 
> Ok, but the parser has to compare against something, so my 
> question is if there's any reserved word or something to 
> refer to an empty-nodeset. Let's say the reserved word is 
> "ENS" (Empty Node Set), that way you could 
> write something like this:
> 	
> 	<xsl:if test="Parent/MyNode=ENS">...</xsl:if>
> 
> To select all "Parent" nodes that don't have a "MyNode" 
> child. Maybe it's just me... sometimes I just can't see the 
> easy way to solve problems :)
> 
> Thanks,
> Frank.
> 
> -----Original Message-----
> From: Michael Kay [mailto:mhkay@xxxxxxxxxxxx]
> Sent: lunes, 17 de septiembre de 2001 10:07
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: RE:  Non-existing node
> 
> 
> > 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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