[CUAP] HTTP headers and local copy of a document

Hi QA IG, and Yves,

As a possibility of inclusion for a "maybe-future" version of CUAP
http://www.w3.org/TR/cuap

It happens often that when we read a document online, we want to keep a 
local copy. The context of the document is given by two things:
	- Information contained in the document (encoding, lang, etc.)
	- HTTP headers

What do you think should be the correct behaviour of a "Save as..." 
feature or cache copy in a user agent?

For example if I'm giving parameters like the language, the location, 
the encoding, etc. Should the user agent modify the local file and add 
the necessary meta data if possible (for example in an HTML file) or 
propose to save this information in another file, then the system can 
use it to give more information.

opinions?


-- 
Karl Dubost - http://www.w3.org/People/karl/
W3C Conformance Manager
*** Be Strict To Be Cool ***