MSATS - aseXML B2M schema r47 - August 2026

Audience

B2M Business-to-Market Retail Market Participants along with business analysts and IT staff.

Contents

Summary

• What’s changing
  • New B2M aseXML schema version r47
  • B2M only – no changes to B2B schema
• Why
  • Supports: Shortening the Settlements Cycle (SSC)
  • Flexible Trading Arrangements (FTA)
• Key dates
  • Draft schema: 2 Feb 2026
  • Pre‑production: 8 June 2026
  • Production: 9 August 2026
  • Participant approval due: 23 Feb 2026
• Effective dates for schema population
  • SSC changes: 9 August 2026
  • FTA changes: 1 November 2026
• Schema See aseXML Schema. changes (r46 → r47)
  • New settlement run type: RREV0
  • New standing data fields:
    • IsPCP
    • PremisesNMI
  • Version updates across all impacted B2M schema files
• Participant impact
  • LATEST r46 → LATEST r47 (automatic)
  • CURRENT r46 → SUPERSEDED r46
  • r43/r44 no longer supported
  • Upgrade required to receive new fields
• What participants need to do
  • View schema changes
  • Assess system impacts
  • Upgrade systems to support r47
  • Test in pre‑production before go‑live