Nested binds in future versions of XForms spec

Hi,

I would like to ask if anybody can say something about nested binds in future
versions of XForms spec. Will nested binds exist or not?

I am asking this in the context of these nice refinements of bind element:
http://www.w3.org/MarkUp/Forms/wiki/Unified_evaluation_context


Thank you,
Claudius Teodorescu