Re: 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
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