UBL & XML DSIG

[Jorge Ortiz Claver <jorge.ortiz@tirea.es>]

Hi,

I'm designing an application that is supposed to store digital invoices. 
It will be a kind of invoices repository. UBL standard fullfits most of 
my requirements and as it's used by some ERPs, it would be my first 
choice to store and deliver invoices.

Problem comes up when I want to store a digital signature for the 
invoice in XML DSIG. I've seen other standards (i.e. xCBL) that supports 
XML DSIG signature inside invoice documents but I cannot find the way to 
do that with UBL.

Which is the best way to deal with UBL and XML-DSIG/XadES? Will it be 
supported in future?

Regards,
Jorge