Subject: RE: [xsl] node() and empty elements From: Robert Goheen <RobertG@xxxxxxxxxxx> Date: Wed, 10 Jan 2001 15:26:35 -0800 |
Bingo! It all makes sense to me now. Thanks.... > -----Original Message----- > From: Wendell Piez [mailto:wapiez@xxxxxxxxxxxxxxxx] > Sent: Wednesday, January 10, 2001 10:13 AM > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx > 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@xxxxxxxxxxx > > > > XSL-List info and archive: > http://www.mulberrytech.com/xsl/xsl-list > > ====================================================================== > Wendell Piez mailto:wapiez@xxxxxxxxxxxxxxxx > 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 > ---------------------------------------------------------------------- > Mulberry Technologies: A Consultancy Specializing in SGML and XML > ====================================================================== > > > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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