Moved most of the Prod_Syntax - stuff to HOLogic.
(* Title: Sequents/ROOT
ID: $Id$
Author: Lawrence C Paulson, Cambridge University Computer Laboratory
Copyright 1991 University of Cambridge
Adds Classical Sequent Calculus to a database containing pure Isabelle.
*)
val banner = "Sequent Calculii";
writeln banner;
reset global_names;
print_depth 1;
use_thy "Sequents";
use "prover.ML";
use_thy "LK";
use_thy "ILL";
use_thy "Modal0";
use_thy"T";
use_thy"S4";
use_thy"S43";
print_depth 8;
val Sequents_build_completed = (); (*indicate successful build*)