WE BUILD — Architecture & Integration Blueprint (D4.1)
  • Architecture & Integration Blueprint
  • Architecture Decision Records
  • Conformance Specifications
  • Business Wallet Definition
  • Trust Infrastructure
  • QTSP Documentation

On this page

  • 1 Atomic Granularity for Mandate-Related Attestations
    • 1.1 Context
    • 1.2 Decision
    • 1.3 Consequences
      • 1.3.1 What becomes easier?
      • 1.3.2 What becomes more difficult?
      • 1.3.3 How do we address the risks introduced by this change?
    • 1.4 Advice

1 Atomic Granularity for Mandate-Related Attestations

Authors:

  • Consortium Architecture Working Group AMS Track 4

  • Boris Lingl, boris.lingl@datev.de

  • Alexander Manecke, a.manecke@telekom.de

  • Ignacio Ripoll, ignacio.ripoll@corpme.es

  • Iris Speiser, iris.speiser@datev.de

  • Marlene Urbschat, marlene.urbschat@datev.de

1.1 Context

Individuals may hold multiple powers, mandates, or authorizations on behalf of an organization.

The consortium needed to determine whether mandate-related attestations should contain multiple faculties or be limited to a single authorization scope.

The core trade-off is between expressiveness and implementation simplicity.

1.2 Decision

Mandate-related attestations shall be atomic.

Each attestation shall contain exactly one faculty or one service authorization.

Multiple powers shall be represented by multiple attestations rather than by composite authorization structures.

1.3 Consequences

1.3.1 What becomes easier?

  • Simpler issuance and validation processes.
  • Clear and unambiguous authorization semantics.
  • Improved interoperability across participants.
  • Easier lifecycle management of individual permissions.

1.3.2 What becomes more difficult?

  • Multiple attestations may be required for a single representative.
  • Presentation and management of large authorization sets may become more complex.
  • Real-world mandate structures may require aggregation mechanisms.

1.3.3 How do we address the risks introduced by this change?

  • Allow wallets and verifiers to present and process multiple attestations together.
  • Define guidance for bundling and presenting related attestations.
  • Reassess granularity requirements as additional use cases emerge.

1.4 Advice

  • 2026-06-11: Consortium Working Group: Prefer simple, composable attestations over complex multi-purpose credentials.
  • 2026-06-11: Technical Participants: Atomic credentials simplify interoperability and validation logic.

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