rowspacing

Hi Math WG,

First I give as attachment an image for the test 
Topics/EmbellishedOp/embStretch1 (in the current sample rendering, the 
parentheses do not seem to stretch).

Now, I would like to have some precisions on the way rowspacing works. 
So suppose we have a mtable of N rows, framespacing="X,X" and 
rowspacing="Y0, Y2, ..., Y_(n-1)".

I understand that rowspacing applies to each "gap" and so we have the 
following:

^
| X
V
-----
/////
row0
/////
-----
^
| Y_(0 mod n)
V
-----
/////
row1
/////
-----
^
| Y_(1 mod n)
V
-----
/////
...
/////
-----
^
| Y_(N-2 mod n)
V
-----
/////
row_(N-1)
/////
-----
^
| X
V

The problem of my interpretation is that "rowpadding" (i.e. spacing 
inside cells) seems undefined. Roger B. Sidje had a different 
interpretation. IIUC, he thought that rowspacing applies to each row and 
so wanted to split the values before and after:

^
| X
V
-----
^
| Y_(0 mod n)/2
V
row0
^
| Y_(0 mod n)/2
V
-----
^
| Y_(1 mod n)/2
V
row1
^
| Y_(1 mod n)/2
V
-----
^
| Y_(2 mod n)/2
V
...
^
| Y_(N-1 mod n)/2
V
-----
^
| Y_(N-1 mod n)/2
V
row_(N-1)
^
| Y_(N-1 mod n)/2
V
-----
^
| X
V

Combining the two ideas, we get another possible interpretation: apply 
rowspacing to each gap but split the values inside and outside the cells:

^
| X/2
V
-----
^
| X/2
V
row0
^
| Y_(0 mod n)/2
V
-----
^
| Y_(0 mod n)/2
V
row1
^
| Y_(1 mod n)/2
V
-----
^
| Y_(1 mod n)/2
V
...
^
| Y_(N-2 mod n)/2
V
-----
^
| Y_(N-2 mod n)/2
V
row_(N-1)
^
| X/2
V
-----
^
| X/2
V

and there are probably more interpretations...

Thanks by advance for your answer(s).
-- 
Frédéric Wang.
Website <http://www.maths-informatique-jeux.com/> - Weblog 
<http://www.maths-informatique-jeux.com/blog/frederic/>