Isabelle NEWS -- history of user-visible changes
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New in Isabelle94-8 (???????????)
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* the NEWS file;
* new utilities to build / run / maintain Isabelle etc. (in parts
still somewhat experimental);
* simplifier: termless order as parameter; added interface for
simplification procedures (functions that produce *proven* rewrite
rules on the fly, depending on current redex);
* now supports alternative (named) syntax tables (parser and pretty
printer); internal interface is provided by add_modesyntax(_i);
* Pure, FOL, ZF, HOL, HOLCF now support symbolic input and output; to
be used in conjunction with the isabelle symbol font; uses the
"symbols" syntax table;
* infixes may now be declared with names independent of their syntax;
* added typed_print_translation (like print_translation, but also gets
the type of the constant);
* prlim command for dealing with lots of subgoals (an easier way of
setting goals_limit);
* HOL/ex/Ring.thy declares cring_simp, which solves equational
problems in commutative rings, using axiomatic type classes for + and *;
* ZF now has Fast_tac, Simp_tac and Auto_tac. WARNING: don't use
ZF.thy anymore! Contains fewer defs and could make a bogus simpset.
Beware of Union_iff. eq_cs is gone, can be put back as ZF_cs addSIs
[equalityI];
* more examples in HOL/MiniML and HOL/Auth;
* more default rewrite rules in HOL for quantifiers, union/intersection;
New in Isabelle94-7 (November 96)
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* allowing negative levels (as offsets) in prlev and choplev;
* many more things we do not remember :-)
$Id$