--- a/NEWS Mon Apr 20 12:27:23 2009 +0200
+++ b/NEWS Mon Apr 20 16:28:13 2009 +0200
@@ -4,6 +4,25 @@
New in this Isabelle version
----------------------------
+*** Pure ***
+
+* On instantiation of classes, remaining undefined class parameters are
+formally declared. INCOMPATIBILITY.
+
+
+*** HOL ***
+
+* Class semiring_div requires superclass no_zero_divisors and proof of div_mult_mult1;
+theorems div_mult_mult1, div_mult_mult2, div_mult_mult1_if, div_mult_mult1 and
+div_mult_mult2 have been generalized to class semiring_div, subsuming former
+theorems zdiv_zmult_zmult1, zdiv_zmult_zmult1_if, zdiv_zmult_zmult1 and zdiv_zmult_zmult2.
+div_mult_mult1 is now [simp] by default. INCOMPATIBILITY.
+
+* Power operations on relations and functions are now dedicated constants:
+
+ relpow with infix syntax "^^"
+ funpow with infix syntax "^o"
+
New in Isabelle2009 (April 2009)