Mon, 04 Jan 2010 19:08:10 +0100 wenzelm back to explicit management of documents -- not as generic Session.Entity -- to avoid ill-defined referencing of new states;
Mon, 04 Jan 2010 00:13:09 +0100 wenzelm slightly more uniform/robust handling of visible document;
Sun, 03 Jan 2010 23:03:04 +0100 wenzelm recovered explicit Changed.id (copy of future document) -- avoids premature joining of result;
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