Wed, 09 Nov 2011 17:08:40 +0100 wenzelm avoid inconsistent sort constraints;
Wed, 09 Nov 2011 15:18:39 +0100 wenzelm localized Record.decode_type: use standard Proof_Context.get_sort;
Wed, 09 Nov 2011 14:58:48 +0100 wenzelm tuned signature -- emphasize internal role of these operations;
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