Subject: RE: [xsl] Possible to pass 'empty sequence' to function? From: "Michael Kay" <mike@xxxxxxxxxxxx> Date: Thu, 31 Mar 2005 13:11:45 +0100 |
> So, just to be clear about this: > > <xsl:variable name="foo" as="xs:string?">Hello</xsl:variable> > <xsl:variable name="bar">World</xsl:variable> > > <xsl:value-of select="concat($foo,' ',$bar)"/> > > Here at the point of the concat() $foo is -already- a string > and $bar is > a nodeset? That is, $foo is never a nodeset and $bar is nodeset that > gets implicitly cast to a string? Yes. Technically the conversion isn't a cast, it's atomization, but that's a quibble. Also, XSLT 2.0 doesn't talk about nodesets: the type of $bar is document-node(). > > If so, this would mean it's possible to make a choice between long > if-then-elses in the select attribute and choose/whens in the > body based > on readability/maintainability etc and not on performance. Yes, absolutely. Saxon will probably generate the same internal code for both. Michael Kay http://www.saxonica.com/
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