The table below exists in two versions. The LaTeX version will be used in latex and beamer and the markdown version in all other output formats.
::: {.not-in-format .latex .beamer}
This table is not kept
:::
::: {.only-in-format .latex .beamer}
\begin{tabular}{|c|c|}
\toprule
This table & is used \\ \addlinespace
\midrule
\endhead
in formats & latex, beamer \\ \addlinespace
\bottomrule
\end{tabluar}
:::