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RE: node() and empty elements
- To: "'xsl-list at lists dot mulberrytech dot com'" <xsl-list at lists dot mulberrytech dot com>
- Subject: RE: [xsl] node() and empty elements
- From: Robert Goheen <RobertG at avenuea dot com>
- Date: Wed, 10 Jan 2001 15:26:35 -0800
- Cc: "'Wendell Piez'" <wapiez at mulberrytech dot com>
- Reply-To: xsl-list at lists dot mulberrytech dot com
Bingo! It all makes sense to me now. Thanks....
> -----Original Message-----
> From: Wendell Piez [mailto:wapiez@mulberrytech.com]
> Sent: Wednesday, January 10, 2001 10:13 AM
> To: xsl-list@lists.mulberrytech.com
> Subject: Re: [xsl] node() and empty elements
>
>
> Robert:
>
> When you write
>
> <xsl:value-of select="boolean(node())" />
>
> the argument of the boolean() function is the node-set
> returned by the
> XPath expression
>
> child::node()
>
> so it tests false for an empty element (because it has no children).
>
> try
>
> boolean(self::node())
>
> instead.
>
> Cheers,
> Wendell
>
> >I noticed this behavior that seemed odd to me when using
> MSXML 3.0, and
> >couldn't find anything in the XMLT standards about whether
> this is the
> >proper behavior or not.
> >
> >Given the following fragment:
> ><Tag_1>
> > <Tag_2 />
> ></Tag_1>
> >
> >node() at the Tag_1 context returns true, while at the Tag_2
> context its
> >false. It struck me as odd, as I expected an "empty node"
> to be a node none
> >the less.
> >
> >Is this the expected behavior or an MSXML feature? And if
> this is the
> >expected behavior, what's the logic behind it? And, if it is
> expected,
> >what's the best way to test for "is-empty-element"?
> >
> >
> >
> >
> >BTW: here's my little test template (a kind'a identity
> transform), just in
> >case I did something wrong....
> >
> ><xsl:template match="/ | *">
> >
> > <xsl:value-of select="name(.)" /> IsNode=<xsl:value-of
> >select="boolean(node())" /> <br/>
> >
> > <xsl:copy>
> > <xsl:apply-templates select="*"/>
> > </xsl:copy>
> ></xsl:template>
> >
> >
> >
> >Thanks!
> >
> >
> >
> >Robert S. Goheen
> >mailto:robertg@avenuea.com
> >
> > XSL-List info and archive:
> http://www.mulberrytech.com/xsl/xsl-list
>
> ======================================================================
> Wendell Piez mailto:wapiez@mulberrytech.com
> Mulberry Technologies, Inc. http://www.mulberrytech.com
> 17 West Jefferson Street Direct Phone: 301/315-9635
> Suite 207 Phone: 301/315-9631
> Rockville, MD 20850 Fax: 301/315-8285
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