The OtOpcUa v2 implementation team committed all 8 core drivers from
internal knowledge of the estate, making the formal protocol survey
unnecessary for driver scoping. Removed current-state/equipment-protocol-
survey.md and cleaned up all references across 7 files.
The UNS hierarchy snapshot (per-site equipment-instance walk for site/area/
line/equipment assignments + UUIDs) is now a standalone Year 1 deliverable,
decoupled from protocol discovery. Tracked in status.md and goal-state.md
UNS naming hierarchy section.
Eliminates ~52 TBDs (all placeholder data in the pre-seeded survey rows).
- EquipmentId is now system-generated ('EQ-' + 12 hex from UUID), never
operator-supplied — eliminates duplicate-identity corruption from typos
and bulk-import renames (lmxopcua decision #125)
- ZTag and SAPID fleet-wide uniqueness enforced via ExternalIdReservation
table outside generation versioning — rollback-safe (decision #124)
- Identifier table now shows who-sets-it column (3 operator, 2 system)
- Note added: ExternalIdReservation pattern is a precedent for non-versioned
cross-generation invariants; check for similar hazard when scoping ACLs
Corrections:
- Notifications: email only, not Teams. Design repo documents SMTP/OAuth2
email only; Teams was incorrectly claimed. Corrected in current-state.md
and legacy-integrations.md (LEG-003).
- EventHub/Kafka forwarding: committed but not yet implemented. Clarified
as a Year 1 ScadaBridge Extensions deliverable, not an existing capability.
Additions from design repo (previously undocumented):
- Dual transport (Akka.NET ClusterClient + gRPC server-streaming)
- Split-brain resolver (keep-oldest, 15s stability, ~25s failover)
- Staggered batch startup (20 instances at a time)
- Central UI: Blazor Server with LDAP/AD, JWT sessions, SignalR debug
- Comprehensive synchronous audit logging (JSON after-state)
- Three-phase deployment process with rollback
- Site-level SQLite (flattened config, not full SQL Server)
- Supervision detail: OneForOneStrategy, Resume/Stop per actor type
Self-contained extract of all OtOpcUa design material from the plan:
architecture context, LmxOpcUa starting point, two namespaces, driver
strategy, deployment, auth, rollout tiers, UNS hierarchy, canonical
model integration, digital twin touchpoints, sites, roadmap, and all
open TBDs. Includes correction-submission protocol for the implementing
agent.
