- 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- version → superseded version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 Keep historical claims for historical questions while blocking them from current instructions when superseded.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.
