[texhax] explanation of \begin{tabular}{TNC} ``table spec''?

[Robin Fairbairns]

> Where are the definitions of what's allowed in ``table spec'' in 
> ``\begin{tabular}{\emph{table spec}}''?
> 
> What do T (Table? it's a right-aligned sans paragraph w/ a set width? 
> how do I change it?)
> 
> N - Number? Seems to be an auto numbering thing
> 
> and C - Code? Sets in monospaced type anyway, but needs special 
> treatment to get spaces?

any reputable latex book will tell you what's allowed by default
(lcrp@|*)

array.sty adds mb<>!; but it also adds the ability to define column
spec letters (dcolumn uses that)

i would guess your TNC (assuming they're for real) are defined using
array.  look for \NewColumnType commands in the document you're
working on (or a package it loads).