Bitemporal time-travel + truth-maintenance-style provenance retraction on Postgres/SQLite (open-source TS graph library)

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I just shipped bitemporal provenance for TypeGraph, my open-source graphs-on-SQL library. Three pieces, usable independently but most powerful together: Valid time: when a fact was true in the world (an invoice's effective date, a role grant's window). Recorded/system time: when the system captured that fact…

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