RE: [xsl] function-available() test on stylesheet functions

["Michael Kay" <mike@xxxxxxxxxxxx>]

The assumption is that as the author of the stylesheet, you know what it
contains.

The idea behind use-when is that it allows you test factors external to the
stylesheet itself, for example information about the XSLT processor or the
environment in which it is operating. If the design required you to look at
the contents of the stylesheet before deciding which parts to filter out, it
would get very circular.

Michael Kay
http://www.saxonica.com/ 

> -----Original Message-----
> From: john@xxxxxxxxxxx [mailto:john@xxxxxxxxxxx] On Behalf Of 
> John McGowan
> Sent: 17 July 2007 21:25
> To: XSL List
> Subject: [xsl] function-available() test on stylesheet functions
> 
> I was trying to use function-available() to try to determine 
> if a stylesheet function had been defined.  I eventually 
> figured out that stylesheet functions are not in the proper 
> context to cause
> function-available() to ever be true.
> 
> So my question is, is there another way to test to see if a 
> stylesheet function exists?
> 
> --
> /John