# Data4 x Westinghouse (AP300 SMR evaluation) revision history

Append-only Arc G field-change log. Forward-only honesty: events accrue from Arc G adoption.

Partnership: [Data4 x Westinghouse (AP300 SMR evaluation)](/partnerships/data4-x-westinghouse-ap300-smr.md)

## Recorded posture

- First recorded event: 2025-03-11
- Last material change: 2025-03-11
- Material event count: 1
- Editorial event count: 0

## Forward-only note

Arc G is forward-only. The event log accrues from the Arc G adoption point. Fields with no events post-baseline equal the current cached value and are not independently verified at any prior date.

_Canonical URL: /partnerships/data4-x-westinghouse-ap300-smr/history. REST: /v1/partnerships/8de0a084-749c-4d35-ad5c-e2ce4acd86db/history. HTML: [/partnerships/data4-x-westinghouse-ap300-smr/history](/partnerships/data4-x-westinghouse-ap300-smr/history)._