RE: [xsl] Re: xsl-list Digest 28 May 2008 05:10:01 -0000 Issue 1511

Subject: RE: [xsl] Re: xsl-list Digest 28 May 2008 05:10:01 -0000 Issue 1511
From: "Michael Kay" <mike@xxxxxxxxxxxx>
Date: Wed, 28 May 2008 17:48:30 +0100
> So, your beautifully crafted instruction:
> > <xsl:value-of
> >    select="for $s in $skus return 
> key('sku',$s[document('mySkus.xml')/skus/sku[starts-with(.,$s)
> ]],$root)/name"
> >    separator=", "/>
> leads me to read more on sequence expressions.  I've got to 
> go figure out why the <xsl:for-each> was not the correct way, 
> how the locally defined <$s> variable works, and how the 
> brackets <[]> work.

Some hints:

1. xsl:value-of can output a sequence of values separated by a given
separator (which defaults to a single space)

2. "for $x in SEQ return f($x)" applies some processing to each item in SEQ
in turn, referring to that item as $x

3. $x[predicate], where $x is a single item (which is the case here) returns
either $x or nothing, depending on whether the predicate is true.

4. The predicate here tests whether mySkus.xml contains a sku that starts
with the string $s

5. key('sku', X, $root) searches the tree rooted at $root for a node whose
sku key is equal to X; if X is "nothing" (see 3 above) then key() returns

Michael Kay

> Interesting that IE and Firefox fail to transform using the 
> stylesheet where Saxon does it just fine.  I guess they don't 
> have built-in version 2 XSLT and/or XPATH features?... 

Correct, none of the browsers yet support XSLT 2.0.

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