Breaking large equations across pages

[Aditya Mahajan <adityam@umich.edu>]

Pagebreak of formula across pagebreaks is broken in the new release 
(ConTeXt  ver: 2006.04.27 15:59).

Consider
\starttext
\placeformula \startformula \startalign
   \dorecurse{50}
   {\NC a \NC  = b \NR[+]}
\stopalign \stopformula
\stoptext

(This used to work earlier, I can not test this, but I have document 
where the display broke across pages. Can somewith with an old ~ Mar, 
2006 release test this?)

Also, is it possible to have more control over where the display 
breaks. With latex, I can force equation break by using
\allowdisplaybreaks[1|2|3|4]

\documentclass{article}
\usepackage{amsmath}
\allowdisplaybreaks %<------------ Try with and without this.
\begin{document}
\begin{align}
   a &= b \\
% Paste the above line 50 times
   a &= b
\end{align}
\end{document}

Ideally, context should also provide something configurable. Maybe, it 
should be part of 
\setupformulas[displaybreak=tolerant|verytolerant|strict|verystrict]

Also there should be something like

\NC .... \NR
\allowdisplaybreak[yes|no|disable...same meaning as in \page[....]
\NC ..... \NR

to have more control over the pagebreak.

Aditya

-- 
Aditya Mahajan, EECS Systems, University of Michigan
http://www.eecs.umich.edu/~adityam || Ph: 7342624008