XSLT 2.0 allows the [xsl:]version attribute on any element. XSLT 1.0
allows it only on the xsl:stylesheet element or a literal result
element.
Michael Kay
-----Original Message-----
From: owner-xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
[mailto:owner-xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com] On Behalf Of
Mike Brown
Sent: 05 March 2003 01:30
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: Re: [xsl] xslt 2, forward compatibility mode.
Michael Kay wrote:
Suppose that XSLT 3.0 has just been published, and it
includes a new
<xsl:perform-magic> instruction, which is implemented in
Saxon version
19.2, but not yet in MSXML6. You want to invoke this
instruction when
your stylesheet is running under Saxon, but when running
under MSXML6,
you just want to leave out that part of the output. So you write:
<xsl:template match="thing" version="3.0">
<xsl:perform-magic select="magic-dust">
<xsl:fallback>Sorry, Microsoft don't do magic</xsl:fallback>
</xsl:perform-magic>
</xsl:template>
Specifying version="3.0" means that the Microsoft processor (or any
XSLT 1.0 or 2.0 processor) is obliged to execute the xsl:fallback
instruction. If you had said version="1.0" or
version="2.0", then the
processor would instead have thrown a static error saying
that there
is no such instruction as xsl:perform-magic.
That does not work.
% cat fallback.xsl
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:output method="xml" indent="yes"/>
<xsl:template match="/" version="3.0">
<result>
<xsl:perform-magic select="magic-dust">
<xsl:fallback>Sorry, we don't do magic</xsl:fallback>
</xsl:perform-magic>
</result>
</xsl:template>
</xsl:stylesheet>
% saxon dummy.xml fallback.xsl
Error at xsl:template on line 7 of
file:/opus/home/mike/xml/test/fallback.xsl:
Attribute
version is not allowed on this element
Error at xsl:perform-magic on line 9 of
file:/opus/home/mike/xml/test/fallback.xsl:
Unknown XSLT
element: perform-magic
Transformation failed: Failed to compile stylesheet. 2 errors
detected.
Mike
--
Mike J. Brown | http://skew.org/~mike/resume/
Denver, CO, USA | http://skew.org/xml/
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list