RE: [xsl] How to use multiple xsl:import

Subject: RE: [xsl] How to use multiple xsl:import
From: Pieter Reint Siegers Kort <pieter.siegers@xxxxxxxxxxx>
Date: Wed, 6 Apr 2005 10:30:29 -0500
Thanx Michael and Dimitre. I understand that using mode will help me control
the way the processor chooses a template. Michael already pointed that out
(both here and in his book) and you clarified it. 

Maybe I stated the question wrong. Actually we're not referring to the
import precedence. We're trying to find a way to name the imported
stylesheets, and apply them **anywhere** we choose in the web page. For
that, there's no functionality in xsl:import, AFAIK. Since xsl:import
doesn't provide this functionality (it is only allowed as a top element, and
it lacks a name or mode attribute), it means we simply cannot use the
approach my collegue had in mind.

But there's another approach. Back in March 2002 I ported a clasical ASP
aplication to using modular approach, using the xsl:include approach. That
would be a better solution, although we'll loose the import precedence
functionality. Following is the mother template where six includes are

<?xml version='1.0' ?>
<xsl:stylesheet xmlns:xsl="";
xmlns:ms="urn:schemas-microsoft-com:xslt" version="1.0">

  <xsl:output method="html" indent="yes" omit-xml-declaration="yes"
encoding="Windows-1252" />

  <xsl:include href="nace6inc1.xsl" />
  <xsl:include href="nace6inc2.xsl" />
  <xsl:include href="nace6inc3sub1.xsl" />
  <xsl:include href="nace6inc3sub2.xsl" />
  <xsl:include href="nace6inc3sub3.xsl" />
  <xsl:include href="nace6inc4.xsl" />

	<xsl:template match="/">
		<xsl:apply-templates select="root" />

	<xsl:template name="root" match="root">


    		<title>E L  N O R T E - nota</title>
				<link href="img/StyleSheet.css"
type="text/css" rel="STYLESHEET" />

  		<body vlink="#000080" alink="#000080" link="#000080"
bgcolor="#ffffff" leftmargin="0" topmargin="0" marginheight="?0?"

     	<!-- Header Terra -->
      <xsl:call-template name="headerTerra" />

     	<!-- Header Elnorte -->
      <xsl:call-template name="headerElnorte" />

    	<table cellspacing="0" cellpadding="0" width="760" border="0">

          	<!-- Parte Izquierda - Navegacion-->
      			<xsl:call-template name="navbarElnorte" />

          	<!-- Parte Central -->
      			<xsl:call-template name="centralElnorte" />

          	<!-- Parte Derecha -Herramientas-->
      			<xsl:call-template name="herrElnorte" />


     	<!-- Parte Derecha -Herramientas-->
 			<xsl:call-template name="footerElnorte" />




Thanx again for the help, I appreciate it a lot!


-----Original Message-----
From: Dimitre Novatchev [mailto:dnovatchev@xxxxxxxxx] 
Sent: Wednesday, April 06, 2005 6:19 AM
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re: [xsl] How to use multiple xsl:import

On Apr 6, 2005 9:50 AM, Pieter Reint Siegers Kort
<pieter.siegers@xxxxxxxxxxx> wrote:
> > Since the two xsl:apply-imports are in the same template, they will 
> > follow
> exactly the same search path in looking for the next template to apply.
> This makes sense.
> > If you want to search different sets of templates in the two cases, 
> > the
> mechanism to use is modes.
> This not... how do I use mode on xsl:import? AFAIK mode belongs to 
> xsl:template and xsl:call-templates... please explain!

This makes perfect sense. Let's take an example:

   If the imported stylesheet contains a template, which matches an element
named "foo" and the importing stylesheet contains a template matching
node(), at the instruction:

    <xsl:apply-templates select="foo"/>

the template from the importing stylesheet will always be selected over the
one from the imported stylesheet as the former has a higher import

The only way to ensure that the wanted template from the imported stylesheet
will be selected is to specify it with a unique mode and change the
xsl:apply-templates to:

    <xsl:apply-templates select="foo" mode="fooprefix:fooMode"/>

where fooprefix is bound to a unique namespace-uri

Often the author of a stylesheet that will be imported doesn't know what
stylesheets will be importing it. The only sound protection from a template
with higher imort precedence being selected instead of owr own is to provide
it with unique mode.

In FXSL there is a general convention that referenced templates (whose
template references are passed as parameters to other
templates/functions) must have:


where "f" is bound to "";

The templates that are passed such parameters initiate the referenced
templates using:

   <xsl:apply-templates mode="f:FXSL"/>

Of course, this is incompatible with the idea of xsl:apply-imports and, it
turns out, the idea of xsl:apply-imports is not a bulletproof one.

See for example: "Reliance on import precedence considered dangerous "
by Jeni Tennison at:

Hope this helped.

Dimitre Novatchev.

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