\begin{tabbing}
$\forall$\=${\it ds}$:$x$:Id fp$\rightarrow$ Type, ${\it da}$:$k$:Knd fp$\rightarrow$ Type, $v$:ecl{-}trans{-}tuple\{i:l\}(${\it ds}$;${\it da}$),\+
\\[0ex]$L$:event{-}info(${\it ds}$;${\it da}$) List, $x$:1of($v$). ecl{-}trans{-}reachable(${\it ds}$;${\it da}$;$v$;$L$;$x$) $\in$ Prop
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\end{tabbing}