Wed, 30 Dec 2009 20:26:08 +0100 wenzelm tuned signature of isabelle.Position;
Wed, 30 Dec 2009 20:18:50 +0100 wenzelm maintain generic session entities -- cover commands, states, etc. (but not yet documents);
Wed, 30 Dec 2009 19:58:22 +0100 wenzelm unified Command and Command_State, eliminated separate Accumulator;
Wed, 30 Dec 2009 18:22:10 +0100 wenzelm removed experimental history panel;
Wed, 30 Dec 2009 17:48:58 +0100 wenzelm more explicit modeling of Command and Command_State as Session.Entity;
Wed, 30 Dec 2009 13:21:46 +0100 wenzelm updated;
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