G29 — Temporal, version, and supersession graph · Graph systems

170 words. Researched design, reviewed 2026-09-12: a library view or proposed design with its sources stated; not a deployed system, a live audit or a provider requirement. Source: Graph/G29-temporal-version-and-supersession-graph.md. Graph systems, shelf 5 of 8; library release 2026.09.12-g40.

Status: NEW RESEARCHED DESIGN; not deployed
Reviewed: 2026-09-12
Nature: library governance view
Priority: P2
Accountability: R14, R11, R24

Question

Which fact or instruction applied at the relevant time?

Nodes

Claim; Document version; Effective interval; Observation; Supersession

Relationship sketch

version → superseded version
claim → applicable interval
observation → collected time

Evidence inputs

Actual publication/effective dates, revision records, retrieval date, scope decisions.

Implementation

Store effective time separately from observation time. Keep historical claims for historical questions while blocking them from current instructions when superseded.

Acceptance checks

An unknown effective date stays null
Current retrieval respects supersession
A review date is not substituted for a publication date

Do not infer

Newer text is not automatically more authoritative than older applicable evidence.

Publication boundary

Public revision notes as appropriate; internal record history private.

Source basis

S12, S14. See Research/sources.json. Sources support the primitives or named technology. The organization, labels, actions, and acceptance contracts in this catalog are this library's design, not claimed provider requirements.