2006-01-19 ago setup: theory -> theory;
2006-01-14 ago generic attributes;
2005-12-16 ago re-arranged tuples (theory * 'a) to ('a * theory) in Pure
2005-12-09 ago oriented result pairs in PureThy
2005-09-15 ago TableFun/Symtab: curried lookup and update;
2005-09-08 ago introduces some modern-style AList operations
2005-09-01 ago curried_lookup/update;
2005-08-16 ago OuterKeyword;
2005-06-17 ago accomodate change of TheoryDataFun;
2005-06-11 ago refer to name spaces values instead of names;
2005-05-31 ago renamed cond_extern to extern;
2005-04-13 ago *** empty log message ***
2005-03-04 ago Removed practically all references to Library.foldr.
2005-03-03 ago Move towards standard functions.
2005-02-13 ago Deleted Library.option type.
2005-01-24 ago Eliminated hack for deleting leading question mark from induction
2003-08-19 ago new case_tac
2001-11-28 ago theory data: removed obsolete finish method;
2001-11-15 ago Isar version of 'rep_datatype';
2001-11-13 ago rearranged inductive package for Isar;
2001-11-08 ago theory data: finish method;
2000-03-13 ago adapted to new PureThy.add_thms etc.;
1999-07-10 ago pass exn;
1999-06-28 ago cond_extern_table;
1999-04-30 ago theory data: copy;
1999-01-19 ago removal of the (thm list) argument of mk_cases
1999-01-13 ago datatype package improvements
1999-01-12 ago eliminated tthm type and Attribute structure;
1999-01-07 ago ZF: the natural numbers as a datatype
1999-01-06 ago induct_tac and exhaust_tac