Re: [xsl] apply-templates and priorities

[Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>]

Simon,

Actually, "*" doesn't match the same node as "/". "*" matches any element 
node (that is a child of something, which all elements are). "/" matches 
the root node (which is not an element).

This explains your result, because the template matching "/" is always 
fired first, and it contains no xsl:apply-templates instruction, so node is 
selected for processing, so the other template never gets matched.

The priorities are a red herring here. Match them both to "/" and you'll 
see what you expect.

Cheers,
Wendell

At 05:55 PM 9/15/2004, you wrote:
> I'm confused about how the priorities of templates are computed.  Using
> saxon 8.0, this stylesheet:
>
> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; 
> version="1.0">
>     <xsl:template match="*" priority="1">
>         <xsl:message>in first</xsl:message>
>     </xsl:template>
>
>     <xsl:template match="/" priority="10">
>         <xsl:message>in second</xsl:message>
>     </xsl:template>
> </xsl:stylesheet>
>
> and an arbitrary source doc produces the message "in second" (as expected).
>
> Now if I switch around the priorities:
>
> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; 
> version="1.0">
>     <xsl:template match="*" priority="10">
>         <xsl:message>in first</xsl:message>
>     </xsl:template>
>
>     <xsl:template match="/" priority="1">
>         <xsl:message>in second</xsl:message>
>     </xsl:template>
> </xsl:stylesheet>
>
> Then I still get "in second" (NOT as expected).  Note that if the
> patterns are the same then this behaviour goes away (the latter
> case produces "in first").  Also, I see the same behaviour in earlier
> versions of saxon.
>
> My understanding of these things is that the default priorities for the
> two templates are different (as per section 5.5 of the 1.0 spec), but
> that the explicit priority just overrides the default priorities.  Is
> something else going on, or have I missed something really simple?


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Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
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Suite 207                                          Phone: 301/315-9631
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