\def\attrx#1{{\em\fg{DarkRed}#1}}
\begin{tabular}{cccccc}
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{VOTABLE}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:VOTABLE}{definition})}}\\ \hline{}
   \attr{ID}\\		%%% what could be the usage of ID here ?
   \attr{version}\\
\hline\end{tabular}
&
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{RESOURCE}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:RESOURCE}{definition})}}\\ \hline{}
   \attr{ID}\\
   \attr{name}\\
   \attr{type}\\
   \attr{utype}\\
\hline\end{tabular}
&
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{TABLE}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:TABLE}{definition})}}\\ \hline{}
   \attr{ID}\\
   \attr{name}\\
   \attr{ucd}\\
   \attr{utype}\\
   \attr{ref}\\
   \attr{nrows}\\
\hline\end{tabular}
&
%%%%%%%%%%%% INFO %%%%%%%%%%%%%%%%%%%
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{INFO}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:INFO}{definition})}}\\ \hline{}
   \attr{ID}\\
   \requiredattr{name}\\
   \requiredattr{value}\\
   \attr{xtype}\\
   \attr{ref}\\
   \attr{unit}\\
   \attr{ucd}\\
   \attr{utype}\\
\hline\end{tabular}
&
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{STREAM}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:STREAM}{definition})}}\\ \hline{}
   \attr{type}\\
   \attr{href}\\
   \attr{actuate}\\
   \attr{encoding}\\
   \attr{expires}\\
   \attr{rights}\\
\hline\end{tabular}
&
\begin{tabular}{@{}c@{}}	%%% This cell has 2 tables
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{FITS}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:FITS}{definition})}}\\ \hline{}
   \attr{extnum}\\
\hline\end{tabular}
	\\ \\
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{TR}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:TR}{definition})}}\\ \hline{}
     \attrx{ID}\\
\hline\end{tabular}
	\\ \\
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{TD}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:TD}{definition})}}\\ \hline{}
   %\attr{ref}\\
   \attrx{encoding}\\
\hline\end{tabular}
\end{tabular}			%%% This cell has 2 tables (end)
%&
%\begin{tabular}{|l|}\hline
%\multicolumn{1}{|c|}{\elem{COOSYS}}\\
%\multicolumn{1}{|c|}{{\em(\Aref{elem:COOSYS}{definition})}}\\ \hline{}
%   \requiredattr{ID}\\
%   \attr{equinox}\\
%   \attr{epoch}\\
%   \attr{system}\\
%\hline\end{tabular}
\\ \\
\\ \\
%\begin{tabular}{|l|}\hline
%\multicolumn{1}{|c|}{\elem{DESCRIPTION}}\\
%\multicolumn{1}{|c|}{{\em(\Aref{elem:DESCRIPTION}{definition})}}\\ \hline{}
%\hline\end{tabular}
%
%\begin{tabular}{|l|}\hline
%\multicolumn{1}{|c|}{\elem{DEFINITIONS}}\\
%\multicolumn{1}{|c|}{{\em(\Aref{elem:DEFINITIONS}{definition})}}\\ \hline{}
%\hline\end{tabular}
%
\begin{tabular}{@{}c@{}}	%{===========
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{GROUP}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:GROUP}{definition})}}\\ \hline{}
   \attr{ID}\\
   \attr{name}\\
   \attr{ref}\\
   \attr{ucd}\\
   \attr{utype}\\
\hline\end{tabular}
\\ \\
%\begin{tabular}{|l|}\hline
%\multicolumn{1}{|c|}{\elem{FIELDref}}\\
%\multicolumn{1}{|c|}{{\em(\Aref{elem:FIELDref}{definition})}}\\ 
%   \hline{}
%   \requiredattr{ref}\\
%\hline\end{tabular}
%\\ \\
%\begin{tabular}{|l|}\hline
%\multicolumn{1}{|c|}{\elem{PARAMref}}\\
%\multicolumn{1}{|c|}{{\em(\Aref{elem:PARAMref}{definition})}}\\ 
%   \hline{}
%   \requiredattr{ref}\\
%\hline\end{tabular}
\end{tabular}			%}=============
&
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{PARAM}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:PARAM}{definition})}}\\ \hline{}
   \attr{ID}\\
   \attr{unit}\\
   \requiredattr{datatype}\\
   \attr{precision}\\
   \attr{width}\\
   \attr{xtype}\\
   \attr{ref}\\
   \requiredattr{name}\\
   \attr{ucd}\\
   \attr{utype}\\
   \attr{arraysize}\\
   \requiredattr{value}\\
\hline\end{tabular}
&
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{FIELD}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:FIELD}{definition})}}\\ \hline{}
   \attr{ID}\\
   \attr{unit}\\
   \requiredattr{datatype}\\
   \attr{precision}\\
   \attr{width}\\
   \attr{xtype}\\
   \attr{ref}\\
   \requiredattr{name}\\
   \attr{ucd}\\
   \attr{utype}\\
   \attr{arraysize}\\
   \attrx{type}\\
\hline\end{tabular}
&
\begin{tabular}{@{}c@{}}	%{===========
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{FIELDref}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:FIELDref}{definition})}}\\ 
   \hline{}
   \requiredattr{ref}\\
   \attr{ucd}\\
   \attr{utype}\\
\hline\end{tabular}
\\ \\
\\ \\
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{PARAMref}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:PARAMref}{definition})}}\\ 
   \hline{}
   \requiredattr{ref}\\
   \attr{ucd}\\
   \attr{utype}\\
\hline\end{tabular}
\end{tabular}			%}=============
%%%%%%%%%%%% INFO %%%%%%%%%%%%%%%%%%%
%\begin{tabular}{|l|}\hline
%\multicolumn{1}{|c|}{\elem{INFO}}\\
%\multicolumn{1}{|c|}{{\em(\Aref{elem:INFO}{definition})}}\\ \hline{}
%   \attr{ID}\\
%   \requiredattr{name}\\
%   \requiredattr{value}\\
%   \attr{ref}\\
%   \attr{unit}\\
%   \attr{ucd}\\
%   \attr{utype}\\
%\hline\end{tabular}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
&
\begin{tabular}{@{}c@{}}
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{MIN}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:MIN}{definition})}}\\ \hline{}
   \requiredattr{value}\\
   \attr{inclusive}\\
\hline\end{tabular}
	\\ \\
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{MAX}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:MAX}{definition})}}\\ \hline{}
   \requiredattr{value}\\
   \attr{inclusive}\\
\hline\end{tabular}
	\\ \\
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{OPTION}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:OPTION}{definition})}}\\ \hline{}
   \attr{name}\\
   \requiredattr{value}\\
\hline\end{tabular}
\end{tabular}
&
\begin{tabular}{@{}c@{}}	%{===========
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{VALUES}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:VALUES}{definition})}}\\ \hline{}
   \attr{ID}\\
   \attr{type}\\
   \attr{null}\\
   \attr{ref}\\
   %\attr{invalid}\\
\hline\end{tabular}
%%%%%%%%%%%% INFO %%%%%%%%%%%%%%%%%%%
%\begin{tabular}{|l|}\hline
%\multicolumn{1}{|c|}{\elem{INFO}}\\
%\multicolumn{1}{|c|}{{\em(\Aref{elem:INFO}{definition})}}\\ \hline{}
%   \attr{ID}\\
%   \requiredattr{name}\\
%   \requiredattr{value}\\
%\hline\end{tabular}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\\ \\
\begin{tabular}{|l|}\hline
\multicolumn{1}{|c|}{\elem{LINK}}\\
\multicolumn{1}{|c|}{{\em(\Aref{elem:LINK}{definition})}}\\ \hline{}
   \attr{ID}\\
   \attr{content-role}\\
   \attr{content-type}\\
   \attr{title}\\
   \attr{value}\\
   \attr{href}\\
   %\attr{gref}\\
   \attrx{action}\\
\hline\end{tabular}
\end{tabular}			%}=============
\\
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\begin{tabular}{|l|}\hline
%\multicolumn{1}{|c|}{\elem{DATA}}\\
%\multicolumn{1}{|c|}{{\em(\Aref{elem:DATA}{definition})}}\\ \hline{}
%\hline\end{tabular}
%
%\begin{tabular}{|l|}\hline
%\multicolumn{1}{|c|}{\elem{TABLEDATA}}\\
%\multicolumn{1}{|c|}{{\em(\Aref{elem:TABLEDATA}{definition})}}\\ \hline{}
%\hline\end{tabular}
%

%\begin{tabular}{|l|}\hline
%\multicolumn{1}{|c|}{\elem{BINARY}}\\
%\multicolumn{1}{|c|}{{\em(\Aref{elem:BINARY}{definition})}}\\ \hline{}
%\hline\end{tabular}
%

\end{tabular}
