# HG changeset patch
# User wenzelm
# Date 1238677620 -7200
# Node ID c22436e6d3504ecbc176b51884c18131e81e80ae
# Parent 740517878d601ad18f6b78f42224575ad6041a24
some more HOL-Nominal news;
diff -r 740517878d60 -r c22436e6d350 NEWS
--- a/NEWS Thu Apr 02 14:49:58 2009 +0200
+++ b/NEWS Thu Apr 02 15:07:00 2009 +0200
@@ -613,8 +613,36 @@
*** HOL-Nominal ***
-* Modernized versions of commands 'nominal_inductive',
-'nominal_primrec', and 'equivariance' work with local theory targets.
+* Nominal datatypes can now contain type-variables.
+
+* Commands 'nominal_inductive' and 'equivariance' work with local
+theory targets.
+
+* Nominal primrec can now works with local theory targets and its
+specification syntax now conforms to the general format as seen in
+'inductive' etc.
+
+* Method "perm_simp" honours the standard simplifier attributes
+(no_asm), (no_asm_use) etc.
+
+* The new predicate #* is defined like freshness, except that on the
+left hand side can be a set or list of atoms.
+
+* Experimental command 'nominal_inductive2' derives strong induction
+principles for inductive definitions. In contrast to
+'nominal_inductive', which can only deal with a fixed number of
+binders, it can deal with arbitrary expressions standing for sets of
+atoms to be avoided. The only inductive definition we have at the
+moment that needs this generalisation is the typing rule for Lets in
+the algorithm W:
+
+ Gamma |- t1 : T1 (x,close Gamma T1)::Gamma |- t2 : T2 x#Gamma
+ -----------------------------------------------------------------
+ Gamma |- Let x be t1 in t2 : T2
+
+In this rule one wants to avoid all the binders that are introduced by
+"close Gamma T1". We are looking for other examples where this
+feature might be useful. Please let us know.
*** HOLCF ***
@@ -630,8 +658,8 @@
Potential INCOMPATIBILITY.
* Command 'fixrec': specification syntax now conforms to the general
-format as seen in 'inductive', 'primrec', 'function', etc. See
-src/HOLCF/ex/Fixrec_ex.thy for examples. INCOMPATIBILITY.
+format as seen in 'inductive' etc. See src/HOLCF/ex/Fixrec_ex.thy for
+examples. INCOMPATIBILITY.
*** ZF ***