Re: [xsl] multiple XML tags -> single output

[zbrown@xxxxxxxxxxxxx]

On Wed, Dec 27, 2000 at 09:05:29PM -0700, Mike Brown wrote:
> zbrown@xxxxxxxxxxxxx wrote:
> > OK, the docs I've got say that '//issue' will match all <issue> elements
> > anywhere in the document. As opposed to 'issue' which only matches children
> > in the current context.
> 
> True, but...
> 
> <xsl:value-of select="//issue/@num"/> 
> 
> Here you are selecting the 'num' attribute of *all* issue elements in the
> document.
> 
> xsl:value-of takes the string-value of its select attribute and makes a
> text node out of it in the result tree. Check the XPath spec and see that
> the string-value of a node-set is the string-value of only the *first*
> node in the set.
> 
> So no matter what the current node is, this will only ever give you the
> value of the first num attribute of the first issue element that has one.
> Is this really what you want?

I see...

well, at the moment it is, but I could see wanting to change it, or use a
more selective construction for something else in the future. For now though,
<title> and <issue> are not really related to each other syntactically,
except by what the output wants. So it really does have to take the first
instance that's available.

> 
> Also, the concat() function is standard XPath/XSLT and will work with your
> processor. You just need to be sure the paths are correct. Doing 3
> xsl:value-of instructions in a row is relatively wasteful.

Well, I've tried but it doesn't seem to work... that part of the XSL file
doesn't produce any output at all when I use concat().

I've also noticed an interesting error, maybe only due to XML::XSLT, where an
XML snippet containing <a href="URL">text</a> will crash the module if I use an
XSL snippet like this:

    <xsl:template match="a">
        <a href="<xsl:value-of select="@href"/>"><xsl:value-of select="."/></a>
    </xsl:template>

The above looks OK to me, but my script returns

not well-formed at line 47, column 17, byte 1320 at
/usr/lib/perl5/5.005/i386-linux/XML/Parser.pm line 168

and dies. (line 47 is that very part of the XSL file)

Zack

> 
>    - Mike
> ____________________________________________________________________
> Mike J. Brown, software engineer at            My XML/XSL resources: 
> webb.net in Denver, Colorado, USA              http://skew.org/xml/
> 
> 
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
> 
> 

-- 
-- 
Zack Brown, Linuxcare, Inc.
tel: 1-415-354-4878x284, fax: 1-415-701-7457
zbrown@xxxxxxxxxxxxx, http://www.linuxcare.com/
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