[office] Clarifications

Hello all,

I'm in the process of creating a specification document conforming to 
OASIS rules, and putting in last meeting's changes while I'm at it. Some 
question came up:


1) 'genre' elements
We agreed to put in 'genre' elements for different document types. Two 
issues:

1a) How are they named?
So far, I've just used the office:class attribute names (text, 
text-global, drawing, presentation, spreadsheet, chart) with an office 
namespace.

1b) office:class attribute obsoleted?
Do I assume correctly that this would obsolete the office:class attribute?


2) <office:body> attribute
The current <office:body> element has a table:structure-protected 
attribute. IIRC, this is meant for spreadsheet documents, so I assume 
this would be moved to the spreadsheet 'genre' element, or even elsewhere.


3) <office:settings> optional?
All first level elements are optional except for the <office:body> 
element. The idea is: No body -> no document, and all else is optional!
For some reason, the <office:settings> element as child of the 
<office:document-settings> element was made mandatory. I guess this was 
just an oversight in the original definition, and should get fixed.


Any comments or disagreements?


Sincerely,
Daniel