2008-05-07 berghofe 2008-05-07 Adapted to encoding of sets as predicates
2007-09-27 paulson 2007-09-27 removal of some "ref"s from res_axioms.ML; a side-effect is that the ordering theorems of Nat.thy are hidden by the Ordering.thy versions
2006-06-07 wenzelm 2006-06-07 removed obsolete ML files;
2005-09-06 wenzelm 2005-09-06 converted to Isar theory format;
2001-08-08 paulson 2001-08-08 Main is the proper parent of IOA
1998-01-08 oheimb 1998-01-08 corrected Title
1997-10-10 wenzelm 1997-10-10 fixed dots;
1997-04-30 mueller 1997-04-30 old IOA meta theory (see also new version in HOLCF/IOA/meta_theory);