Wed, 16 Apr 2008 21:53:00 +0200 wenzelm removed unused space_of;
Wed, 16 Apr 2008 21:52:59 +0200 wenzelm valid_facts: more elementary version using Facts.fold_static;
Wed, 16 Apr 2008 21:52:58 +0200 wenzelm Facts.dest_static;
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