Re: [xsl] XSLT 2.0: When to use xsl:sequence, when to use xsl:value-of,

On Sat, 16 Jun 2007 14:55:24 -0600, Florent Georges  
<darkman_spam(_at_)yahoo(_dot_)fr> wrote:
>   Well, in this particular example, that doesn't change a
> lot.
Yeah, and I'm guessing that in cases where there is a difference it will  
be 100% related to performance, which in most cases is going to be  
processor dependent.  So I guess the question of "all things being equal,  
which would be the prefered method?" would be answered by: "Well that  
depends..." :D
> But there are cases where the generated content will
> not be the same, depending on the content of the sequence
> itself.  Read through the §5.7 "Sequence Constructors", this
> is very useful, interesting and well, required to write
> XSLT
Oh, I've read the spec more than I would like to admit in a public  
setting. ;-)  That said, looks like its time for another reading session  
to update this cranium of mine with a deeper understanding of this  
particular topic.
>  For an example:
>    <xsl:transform
>         xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
>         version="2.0">
>      <xsl:output indent="yes" omit-xml-declaration="yes"/>
>      <xsl:variable name="v" as="element()+">
>         <elem>1</elem>
>       </xsl:variable>
>      <xsl:variable name="s" select="
>           $v/text(), 'a', $v/text()"/>
>      <xsl:template match="/">
>         <sequence>
>           <xsl:sequence select="$s"/>
>         </sequence>
>         <value-of>
>           <xsl:value-of select="$s"/>
>         </value-of>
>       </xsl:template>
>    </xsl:transform>
> should produce:
>    <sequence>1a1</sequence>
>     <value-of>1 a 1</value-of>
Oh, interesting.  Okay, so yeah, with this in mind I can now see what you  
are referring to.  Thanks for taking the time to provide the sample!
>  I say "should" because I've really evaluated the example
> with Saxon and got instead:
>    <sequence>1a1</sequence>
>     <value-of>1 a1</value-of>
>  So I reread §5.7.2 and I can't understand how this result
> is build.  Seems like a bug to me, while it would be very
> surprising to still find this kind of bug in Saxon.
> Michael?
Hey, even better!  I don't mean that in a "Ha ha, Saxon or the spec have a  
bug!" and instead from the standpoint that finding bugs in either of these  
items is going to be a rare event, so if they exist, the sooner they are  
found, the better.
Thanks for your help, Florent!

--
/M:D

M. David Peterson
http://mdavid.name | http://www.oreillynet.com/pub/au/2354 |  
http://dev.aol.com/blog/3155
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