Thu, 04 May 2017 15:38:24 +0200 wenzelm clarified signature: PostgreSQL manages high-volume data, SQLite only sees small snapshots;
Thu, 04 May 2017 15:31:27 +0200 wenzelm clarified database layout: pull date progression follows Isabelle only, and AFP is derived from that;
Thu, 04 May 2017 15:20:57 +0200 wenzelm redundant;
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