make sure that "add:" doesn't influence the relevance filter too much
Subject: Announcing Isabelle2009-2To: isabelle-users@cl.cam.ac.ukIsabelle2009-2 is now available.This release improves upon Isabelle2009-1 in many respects, see theNEWS file in the distribution for more details. Some notable changesare:* Explicit proof terms for type class reasoning.* Robust treatment of concrete syntax for different logical entities;mixfix syntax in local proof context.* Type declarations and notation within local theory context.* HOL: package for quotient types.* HOL code generation: simple concept for abstract datatypes obeyinginvariants (e.g. red-black trees).* HOL: new development of the Reals using Cauchy Sequences.* HOL: reorganization of abstract algebra type class hierarchy.* HOL: substantial reorganization of main library and related tools.* HOLCF: reorganization of 'domain' package.You may get Isabelle2009-2 from the following mirror sites: Cambridge (UK) http://www.cl.cam.ac.uk/research/hvg/Isabelle/ Munich (Germany) http://isabelle.in.tum.de/ Sydney (Australia) http://mirror.cse.unsw.edu.au/pub/isabelle/