Thu, 23 Nov 2006 11:39:11 +0100 aspinall Add retractfile to supported pgip commands
Thu, 23 Nov 2006 11:24:33 +0100 aspinall PGIP: add retractfile. Be stricter in file open/close protocol.
Thu, 23 Nov 2006 00:52:23 +0100 wenzelm replaced Args.map_values/Element.map_ctxt_values by general morphism application;
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