Re: [xsl] strong typed variable with restriction ?

[Michael Kay <mike@xxxxxxxxxxxx>]

On 02/02/2011 12:43, Michel Hendriksen wrote:
> Or add a message in an xsl:otherwise...
>
> <xsl:message terminate="yes|no">
>
>    <!-- Content:template -->
>
> </xsl:message>

No, that won't solve the problem. If the declared type of the function 
is element(), then the otherwise branch (whether explicit or implicit, 
whether executed or not) must return an element.

(It's not like Java, where you can declare a function to return String, 
and still return null. If you want to allow a "null" return in XSLT, you 
need to declare the result as "xs:string?").

Michael Kay
Saxonica