[widgets] W3C Widgets Digital Signatures implementer feedback

Dear Web Apps WG,
Opera would like to provide some feedback based on our implementation 
experience of the Widgets Digsig specification.

Generally, we found that the specification is implementable but have 
significant concerns about the requirement on XML Canonicalization 1.1. 
Basically, we found that in practice you don't need it for this version 
of the spec as widget signatures do not make use of the things 
Canonicalization 1.1 addresses.

We would like to propose the specification be changed to use XML 
Canonicalization 1.0 throughout the specification.

If other implementers have found the same thing (i.e., they don't 
require Canonicalization 1.1), then please lets start a discussion about 
what changes need to be made to the specification and the potential 
impact of using Canonicalization 1.0 exclusively throughout.

If we get rapid agreement, then we can move to updating the spec, 
changing the test cases, and republishing as a new LC ASAP.

Kind regards,
Marcos