Fri, 05 Aug 2022 21:29:25 +0200 wenzelm clarified signature: less redundant -- Sessions.Base_Info already specifies the main session;
Fri, 05 Aug 2022 21:18:02 +0200 wenzelm tuned signature: more operations;
Fri, 05 Aug 2022 21:10:41 +0200 wenzelm misc tuning and clarification;
Fri, 05 Aug 2022 20:54:39 +0200 wenzelm clarified Document.Snapshot.all_exports: refer to material from this (virtual) session;
Fri, 05 Aug 2022 19:02:38 +0200 wenzelm clarified database query: refer to semantic theories;
Fri, 05 Aug 2022 18:45:49 +0200 wenzelm clarified signature: more operations;
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