Re: [xsl] A parameter current context or context passed

[JBryant@xxxxxxxxx]

Wouldn't the context always be the context of the parameter being passed 
in so "/" would never resolve to the source xml?
--------------------------------------------

Hi, Karl,

Well, when you write:

<xsl:param name="something" select="whatever"/>

you are creating a default value for the parameter. The whatever will only 
apply if no value is passed for the parameter. At that point, the only 
available context is the source document, so / picks up the root node of 
the source document.

I did some quick testing. With the following source document:

<?xml version="1.0" encoding="UTF-8"?>
<x>ABCD</x>

and the following stylesheet:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="2.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:output method="xml" omit-xml-declaration="no" indent="yes"/>

  <xsl:param name="in" select="/"/>
 
  <xsl:template match="/">
    <x>
      <xsl:value-of select="$in"/>
    </x>
  </xsl:template>

</xsl:stylesheet>

I got the following output when I specified in="hello" as a parameter:

<?xml version="1.0" encoding="UTF-8"?>
<x>hello</x>

And the following output when I left off the parameter:

<?xml version="1.0" encoding="UTF-8"?>
<x>ABCD</x>

Tested with Saxon 8.4.

I don't use unions (|) much, so I am not sure of its behavior in this 
situation.

Jay Bryant
Bryant Communication Services
(presently consulting at Synergistic Solution Technologies)





Karl Stubsjoen <kstubs@xxxxxxxxx> 
05/13/2005 01:35 PM
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Re: [xsl] A parameter current context or context passed






> / is the document root. So I think you want just select="current()" (or
> even just select=".").

I would think I want "/" or "."  Wouldn't the context always be the
context of the parameter being passed in so "/" would never resolve to
the source xml?
Not sure what "/" over "." would gain in this case.

I have tested my param, and it seems to work fine.  I don't get the |
"pipe".  Is that an OR operator in this case?  Or is it more like a
switch?


> On 5/13/05, JBryant@xxxxxxxxx <JBryant@xxxxxxxxx> wrote:
> Hi, Karl,
> 
> / is the document root. So I think you want just select="current()" (or
> even just select=".").
> 
> Untested, so I might be off.
> 
> Jay Bryant
> Bryant Communication Services
> (presently consulting at Synergistic Solution Technologies)
> 
> Karl Stubsjoen <kstubs@xxxxxxxxx>
> 05/13/2005 12:48 PM
> Please respond to
> xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> 
> To
> xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> cc
> 
> Subject
> [xsl] A parameter current context or context passed
> 
> 
> This should be an easy one...
> 
> I have the following paramter:
> <xsl:param name="current" select="/ | current()"/>
> 
> As the name implies it should be the current context unless otherwise
> specified.  Have I written this correct?