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Re: [xsl] Confusing namespaces and xslt

2008-09-30 12:35:33
That was it!  I tweaked the namespace in the stylesheet. That will
teach me to pay careful attention to the namespaces going forward! :)

Thanks!



On Tue, Sep 30, 2008 at 12:00 PM, Evan Lenz <evan(_at_)evanlenz(_dot_)net> 
wrote:
Make sure that we're using the same namespace URI. Suspecting an oversight,
I added "http://"; to the beginning of the "client" namespace URI in the
source XML. That was the only change to your XML that I made before testing
the stylesheet below. It would also explain the behavior you're seeing. That
rule will only match if the <work-managers> element is associated with the
same exact namespace URI as the "client" prefix in the stylesheet. So
changing the URI in either the stylesheet or the source document should fix
it. Let me know if it doesn't!

Evan


Paul wrote:

Evan,

  Hmmm...the work-manager element isn't being added for some reason
for me using the snippet you provided. I like the "surgical" approach,
but I'm not sure why this snippet:



 <!-- Append a <box:work-manager> element to the end of <work-managers>
content -->
 <xsl:template mode="append" match="client:work-managers">
 <box:work-manager>
   <!-- etc. -->
 </box:work-manager>
 </xsl:template>


isn't running as expected. If I put in some debug statements the
work-managers element is being handled by the transform (with the
copy) later in your snippet, not but this focused snippet.


Paul


On Tue, Sep 30, 2008 at 10:28 AM, Paul <pflists(_at_)gmail(_dot_)com> wrote:


Thanks! That is very helpful.

On Mon, Sep 29, 2008 at 5:57 PM, Evan Lenz <evan(_at_)evanlenz(_dot_)net> 
wrote:


I like to be as surgical as possible in my incremental transforms,
especially when I've got a lot of things to update. In this case, I
might
use different modes, such as "content" and "append", as shown below:

<xsl:stylesheet version="1.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
 xmlns:client="http://somecompany.com/box/client";
 xmlns:box="http://somecompany.com/box";
 exclude-result-prefixes="client">

<!-- BUSINESS LOGIC: -->
 <!-- Set the value for all <box:rotation-time> elements -->
 <xsl:template mode="content"
match="box:rotation-time">newvalue</xsl:template>

 <!-- Append a <box:work-manager> element to the end of <work-managers>
content -->
 <xsl:template mode="append" match="client:work-managers">
 <box:work-manager>
   <!-- etc. -->
 </box:work-manager>
 </xsl:template>


<!-- GENERIC UTILITY CODE: -->
 <!-- Identity transform for attributes, elements, comments, text, and
PIs
-->
 <xsl:template match="@* | node()">
 <xsl:copy>
   <!-- Everything here (inside <xsl:copy>) only applies to elements -->
   <xsl:apply-templates select="@*"/>
   <xsl:apply-templates mode="content" select="."/>
   <xsl:apply-templates mode="append" select="."/>
 </xsl:copy>
 </xsl:template>

       <!-- By default, just process the existing content -->
       <xsl:template mode="content" match="*">
         <xsl:apply-templates/>
       </xsl:template>

       <!-- By default, don't append anything -->
       <xsl:template mode="append" match="*"/>

</xsl:stylesheet>

In other cases, I've also used "insert" (insert before existing
content),
"before" (insert before the element itself), "after" (insert after the
element), and "att-value" (for updating just the attribute value,
without
having to explicitly create a new attribute using <xsl:attribute> every
time).

Having such surgical precision can be very satisfying, but I don't
usually
bother if there are only one or two things to update (as in this
example).
But I thought I'd throw the idea out there anyway, in case you have lots
of
things to update or you anticipate adding more update rules.

Evan




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