diff -r 722bf1319be5 -r fd1be45b64bf IOA/example/Spec.thy
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/IOA/example/Spec.thy	Wed Nov 02 11:50:09 1994 +0100
@@ -0,0 +1,34 @@
+Spec = List + IOA + Action +
+
+consts
+
+spec_sig   :: "'m action signature"
+spec_trans :: "('m action, 'm list)transition set"
+spec_ioa   :: "('m action, 'm list)ioa"
+
+rules
+
+sig_def "spec_sig == <UN m.{S_msg(m)}, \
+\                     UN m.{R_msg(m)}, \
+\                     {}>"
+
+trans_def "spec_trans =                            \
+\ {tr. let s = fst(tr);                            \
+\          t = snd(snd(tr))                        \
+\      in                                          \
+\      case fst(snd(tr))                           \
+\      of                                          \
+\      S_msg(m) => t = s@[m]  |                    \
+\      R_msg(m) => s = (m#t)  |                    \
+\      S_pkt(pkt) => False |                    \
+\      R_pkt(pkt) => False |                    \
+\      S_ack(b) => False |                      \
+\      R_ack(b) => False |                      \
+\      C_m_s => False |                            \
+\      C_m_r => False |                            \
+\      C_r_s => False |                            \
+\      C_r_r(m) => False}"
+
+ioa_def "spec_ioa == <spec_sig, {[]}, spec_trans>"
+
+end