Task: DQ messaging subsystem
This page documents a task in the Data Quality subsystem and Data Librarian story. It captures the goal, current status, acceptance, and any notes or results.
Goal
Open a new subsystem in the binary protocol for DQ messages, and migrate the change-management messages into it.
Status
| Field | Value |
|---|---|
| State | DONE |
| Parent story | Data Quality subsystem and Data Librarian |
| Now | Completed 2026-01-19. |
| Waiting on | None. |
| Next | None. |
| Last touched | 2026-01-19 |
Acceptance
- New subsystem 0x6000-0x6FFF reserved for DQ.
- CRUD + history protocols for catalogs, data domains, subject areas, datasets, methodologies, coding schemes, dimensions (nature, origin, treatment).
- Change-management messages migrated from IAM (0x2050-0x2061) to DQ (0x6070-0x6081).
- Protocol bump 21.3 → 22.0 (breaking).
dq_message_handler+ registrar processes incoming DQ traffic.
Plan
Captured during execution; cleared into the parent story on close.
Notes
Breaking change made up-front before too many clients depend on the IAM range for change-management.
Result
DQ messaging in place; change-management lives in the right place now.