XForms - "Suspend and resume support"

On
http://www.w3.org/MarkUp/Forms/
one of the "Key Goals" of XForms is stated to be "Suspend and Resume" 
support.

Is this a key goal for XForms 1.0? Or for a later version?

I may be missing a moderately obvious approach somewhere, but it isn't 
obvious to me that an XForms 1.0 "form" actually captures all the necessary 
data to allow suspend and resume.

Or is this another scenario where some process external to XForms is to 
provide the functionality.

I tried saving a partly filled-in form in X-Smiles. It saved the form 
apparently happily but choked when trying to reload it.

Eager for clarification. Open to be educated.

Andrew Watt