FA-45728 / Data systems / Member archive

Temporal enrichment excludes a version effective exactly at fact time · case 03

Temporal enrichment excludes a version effective exactly at fact time.

Member previewVariant 3 · 3 implementations · 7 checks per implementation

Case contract

Enrich facts [id,key,event-time] from versioned dimension rows [key,valid-from,revision,payload,tombstone]. For matching non-null key, use the greatest (valid-from,revision) no later than fact time. A selected tombstone yields None and blocks fallback to older versions. Emit [fact-id,payload-or-None].

Why this case matters

A bounded deterministic data engine model makes representation and changelog faults reproducible.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
exact effective time	`[[10, null]]`	`[[10, "current"]]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.