My impression from reading it was that many simple calls would be directly
portable, for example

<xsl:value-of select="math:sin($x)" xmlns:math="java:java.lang.Math"/>

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

> -----Original Message-----
> From: Florent Georges [mailto:lists@xxxxxxxxxxxx] 
> Sent: 30 October 2008 12:30
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: Re:  Extensions in AltovaXML
> 
> Michael Kay wrote:
> 
> > Nice to see also that they have followed conventions which are very 
> > close to those used by Saxon, meaning that it should be 
> possible (as 
> > far as I can see from a quick reading) to write stylesheets 
> that use 
> > Java or .NET extensions and work with both products.
> 
>   Unless one has to use product-specific implementation of 
> the extension (which is likely to be the case.)  Because that 
> mechanism involves using the qualified class name directly in 
> the stylesheet, without any kind of indirection.
> 
>   (well, I speak for Java at least)
> 
>   Regards,
> 
> --
> Florent Georges
> http://www.fgeorges.org/