\begin{tabbing}
$\forall$${\it ds}$:fpf(Id; $x$.Type), ${\it da}$:fpf(Knd; $k$.Type), $A$:ecl{-}trans{-}tuple\=\{i:l\}\+
\\[0ex](${\it ds}$; ${\it da}$).
\-\\[0ex]ecl{-}trans{-}ks($A$) $\in$ (Knd List)
\end{tabbing}