\begin{longtable}[]{@{}rlcl@{}}
\caption{Demonstration of a simple table. \label{tbl:1}}\tabularnewline
\toprule
Right & Left & Center & Default\tabularnewline
\midrule
\endfirsthead
\toprule
Right & Left & Center & Default\tabularnewline
\midrule
\endhead
12 & 12 & 12 & 12\tabularnewline
123 & 123 & 123 & 123\tabularnewline
1 & 1 & 1 & 1\tabularnewline
\bottomrule
\end{longtable}

\Cref{tbl:1} is from the Pandoc User's Guide. A simpler table is given
by \cref{tbl:2}:

\begin{longtable}[]{@{}ll@{}}
\caption{Even simpler. \label{tbl:2}}\tabularnewline
\toprule
A & B\tabularnewline
\midrule
\endfirsthead
\toprule
A & B\tabularnewline
\midrule
\endhead
0 & 1\tabularnewline
\bottomrule
\end{longtable}