CVR is on the mark.
In LaTeX terms balancers like parentheses, braces, brackets, etc.
must be balanced within larger structures such as table cells in
order for a translation with tex4ht to any form of XML to work.
Fortunately, Eitan accommodated the use of \left and \right
with balancers, and, in the case of the minimal example nil
balancers serve well.
Thus, the following works on my platform:
\begin{eqnarray*}
a &=& \left( A \right. \\
&&\quad \left. -\, B \right)
\end{eqnarray*}
As to the question about "plain XML", what you would want
is a LaTeX profile corresponding to the command vocabulary
you are using.
-- Bill
