RE: Possible to pass 'empty sequence' to function?

> > <xsl:variable name="y" as="string?">hello</xsl:variable>
> > 
> > $x is (a sequence of one) string with value "hello"
> 
> 
> Is this really the case?  Does it really mean that the 
> processor doesn't
> construct the temporary tree (and then atomise it?) - if so then it's
> really useful.

The semantics are that the processor creates a text node and then atomizes
it to a string.

What happens internally is of course up to the optimizer.

Michael Kay
http://www.saxonica.com