wenzelm [Thu, 25 Oct 2001 22:41:07 +0200] rev 11936
* Provers: 'simplified' attribute may refer to explicit rules instead
of full simplifier context; 'iff' attribute handles conditional rules;
* HOL/record:
- provides cases/induct rules for use with corresponding Isar methods;
- old "make" and "make_scheme" operation removed -- INCOMPATIBILITY;
- new derived operations "make" (for adding fields of current
record), "extend" to promote fixed record to record scheme, and
"truncate" for the reverse; cf. theorems "derived_defs", which are
*not* declared as simp by default;
- internal definitions directly based on a light-weight abstract
theory of product types over typedef rather than datatype;