Priority is only used to decide which template to apply when you have two
template rules that match the same node. "/" matches root nodes (called
document nodes in XSLT 2.0), while "*" matches element nodes, so there is
never any conflict between these two rules, and therefore no need to
consider their relative priority.
Michael Kay
-----Original Message-----
From: simon_handley(_at_)agilent(_dot_)com
[mailto:simon_handley(_at_)agilent(_dot_)com]
Sent: 15 September 2004 22:56
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] apply-templates and priorities
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?
Thanks,
Simon
--------------------------------------------------------------
----------
Simon Handley
Agilent Technologies
5301 Stevens Creek Boulevard, MS WH
Santa Clara, California 95051-7295
simon_handley(_at_)agilent(_dot_)com
408-553-7122 (w) 408-553-7269 (fax)
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