NEWS

     rel_sum (using inductive).
     INCOMPATIBILITY: use rel_prod.simps and rel_sum.simps instead
     of rel_prod_def and rel_sum_def.
     Minor INCOMPATIBILITY: (rarely used by name) transfer theorem names
     changed (e.g. map_prod_transfer ~> prod.map_transfer).
+  - Parametricity theorems for map functions, relators, set
+    functions, constructors, case combinators, discriminators,
+    selectors and (co)recursors are automatically proved and registred
+    as transfer rules.
+
 
 * Old datatype package:
   - The old 'datatype' command has been renamed 'old_datatype', and
     'rep_datatype' has been renamed 'old_rep_datatype'. They are
     provided by "~~/src/HOL/Library/Old_Datatype.thy". See

     INCOMPATIBILITY.
   - New option 'smt_reconstruction_step_timeout' to limit the
     reconstruction time of Z3 proof steps in the new 'smt' method.
   - New option 'smt_statistics' to display statistics of the new 'smt'
     method, especially runtime statistics of Z3 proof reconstruction.
+
+* Lifting
+  - lift_definition command implements a workaround that allows us 
+    to execute lifted constants that have as a return type 
+    a datatype containing a subtype.
+    This was a long time limitation in the area of code generation and
+    lifting and the used workarounds were tedious.
 
 * Command and antiquotation "value" provide different evaluation slots
 (again), where the previous strategy (NBE after ML) serves as default.
 Minor INCOMPATIBILITY.