# Scheme-specific profiles (ISO 20022 over AS4)

Constraint layers on top of the base FI-to-FI profile **as4.fifi.iso20022.v1** (service **iso20022.fi**, same [Action taxonomy](iso20022-over-as4.md#service--action-taxonomy)). The directory may store scheme in constraints or as transport_profile variant (e.g. `as4.fifi.iso20022.v1.target2`).

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## TARGET2

- **Base profile:** as4.fifi.iso20022.v1
- **Identifiers:** BIC; TARGET2 participant ID (scheme-specific)
- **MPC:** `urgent` for RTGS traffic
- **SLA / timeouts:** Per ECB TARGET2 documentation; tight windows for real-time settlement
- **Reference:** ECB TARGET2 documentation and rulebooks

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## Fedwire

- **Base profile:** as4.fifi.iso20022.v1
- **Identifiers:** Fedwire-specific participant / routing identifiers; US-facing
- **MPC:** As per scheme (e.g. `default` or `urgent` for time-critical)
- **SLA / timeouts:** Per Fedwire rules
- **Reference:** Fedwire documentation and operator rules

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## CHAPS

- **Base profile:** as4.fifi.iso20022.v1
- **Identifiers:** UK CHAPS participant identifiers; BIC where applicable
- **MPC:** As per CHAPS rules (e.g. `urgent` for same-day)
- **SLA / timeouts:** Per CHAPS rules
- **Reference:** CHAPS documentation and Bank of England rules

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## Catalog

See [catalog.md](catalog.md). ISO 20022 over AS4 (FI-to-FI) links to this document for scheme-specific profiles.