2011-02-18 wenzelm 2011-02-18 modernized specifications;
2010-11-18 haftmann 2010-11-18 map_pair replaces prod_fun
2010-07-26 wenzelm 2010-07-26 modernized/unified some specifications;
2010-03-03 wenzelm 2010-03-03 cleanup type translations;
2010-03-01 haftmann 2010-03-01 replaced a couple of constsdefs by definitions (also some old primrecs by modern ones)
2010-02-10 wenzelm 2010-02-10 modernized syntax translations, using mostly abbreviation/notation; minor tuning;
2009-11-27 haftmann 2009-11-27 Inl and Inr now with authentic syntax
2009-10-17 wenzelm 2009-10-17 eliminated hard tabulators, guessing at each author's individual tab-width; tuned headers;
2009-05-12 haftmann 2009-05-12 values is now a keyword
2009-03-04 nipkow 2009-03-04 Made Option a separate theory and renamed option_map to
2008-10-07 haftmann 2008-10-07 arbitrary is undefined
2007-11-30 haftmann 2007-11-30 more canonical attribute application
2006-01-04 nipkow 2006-01-04 Reversed Larry's option/iff change.
2005-12-21 paulson 2005-12-21 removed or modified some instances of [iff]
2005-06-17 haftmann 2005-06-17 migrated theory headers to new format
2004-06-21 kleing 2004-06-21 Merged in license change from Isabelle2004
2004-05-21 wenzelm 2004-05-21 use plain SOME;
2003-08-28 skalberg 2003-08-28 Extended the notion of letter and digit, such that now one may use greek, gothic, euler, or calligraphic letters as normal letters.
2002-10-31 schirmer 2002-10-31 "Definite Assignment Analysis" included, with proof of correctness. Large adjustments of type safety proof and soundness proof of the axiomatic semantics were necessary. Completeness proof of the loop rule of the axiomatic semantic was altered. So the additional polymorphic variants of some rules could be removed.
2002-08-27 wenzelm 2002-08-27 *** empty log message ***
2002-07-10 schirmer 2002-07-10 Added unary and binary operations like (+,-,<, ...); Added smallstep semantics (no proofs about it yet).
2002-02-22 schirmer 2002-02-22 Added check for field/method access to operational semantics and proved the acesses valid.
2002-01-28 wenzelm 2002-01-28 GPLed;
2002-01-28 wenzelm 2002-01-28 tuned header;
2002-01-28 schirmer 2002-01-28 Isabelle/Bali sources;