(* Title: HOL/IOA/example/Spec.thy ID: $Id: Spec.thy,v 1.4 2005/09/03 14:50:26 wenzelm Exp $ Author: Olaf Müller *) header {* The specification of a memory *} theory Spec imports IOA Action begin consts spec_sig :: "action signature" spec_trans :: "(action, nat set * bool)transition set" spec_ioa :: "(action, nat set * bool)ioa" defs sig_def: "spec_sig == (UN l.{Free l} Un {New}, UN l.{Loc l}, {})" trans_def: "spec_trans == {tr. let s = fst(tr); used = fst s; c = snd s; t = snd(snd(tr)); used' = fst t; c' = snd t in case fst(snd(tr)) of New => used' = used & c' | Loc l => c & l~:used & used'= used Un {l} & ~c' | Free l => used'=used - {l} & c'=c}" ioa_def: "spec_ioa == (spec_sig, {({},False)}, spec_trans,{},{})" ML {* use_legacy_bindings (the_context ()) *} end