\begin{tabbing}
R{-}base{-}ma($R$)
\\[0ex]$\,\equiv$$_{\mbox{\scriptsize def}}$$\;\;$\=case $R$ of \+
\\[0ex]Rnone =$>$ 
\\[0ex]Rplus(${\it left}$,${\it right}$)=$>$${\it rec}_{1}$,${\it rec}_{2}$.
\\[0ex]Rinit(${\it loc}$,$T$,$x$,$v$)=$>$ $x$ : $T$ initially $x$ = $v$
\\[0ex]Rframe(${\it loc}$,$T$,$x$,$L$)=$>$ only members of $L$ affect $x$ :$T$
\\[0ex]Rsframe(${\it lnk}$,${\it tag}$,$L$)=$>$ only $L$ sends on (${\it lnk}$ with ${\it tag}$)
\\[0ex]Reffect(${\it loc}$,${\it ds}$,${\it knd}$,$T$,$x$,$f$)=$>$ with declarations 
\\[0ex]ds:${\it ds}$
\\[0ex]da:${\it knd}$ : $T$
\\[0ex]effect of ${\it knd}$(v) is $x$ := $f$ s v
\\[0ex]Rsends(${\it ds}$,${\it knd}$,$T$,$l$,${\it dt}$,$g$)=$>$ with declarations 
\\[0ex]ds:${\it ds}$
\\[0ex]da:fpf{-}join(KindDeq;${\it knd}$ : $T$;lnk{-}decl($l$;${\it dt}$))
\\[0ex]${\it knd}$(v) sends $g$ s v on link $l$
\\[0ex]R\=pre(${\it loc}$,${\it ds}$,$a$,$T$,$P$)=$>$ (with ds: ${\it ds}$\+
\\[0ex]action $a$:$T$
\\[0ex]precondition $a$(v) is
\\[0ex]$P$ s v)
\-\\[0ex]Raframe(${\it loc}$,$k$,$L$)=$>$ $k$ affects only members of $L$
\\[0ex]Rbframe(${\it loc}$,$k$,$L$)=$>$ $k$ sends only on links in $L$
\\[0ex]Rrframe(${\it loc}$,$x$,$L$)=$>$ only members of $L$ read $x$
\-
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