# Siemens Mobility x Metrolinx revision history

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

Partnership: [Siemens Mobility x Metrolinx](/partnerships/siemens-mobility-x-metrolinx.md)

## Recorded posture

- First recorded event: 2026-08-22
- Last material change: 2026-08-22
- 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/siemens-mobility-x-metrolinx/history. REST: /v1/partnerships/721d7724-3f5b-47d1-967b-2a29506d7f7c/history. HTML: [/partnerships/siemens-mobility-x-metrolinx/history](/partnerships/siemens-mobility-x-metrolinx/history)._