OpenIM and adjacent model layers

OpenIM is a firm-level reference model. The diagram shows its relationship to specialist standards and identifier schemes. Implementations sit outside the model and remain under their owners’ control.

Related standards and models provides the detailed explanation and primary source links.

flowchart TB
    classDef openim   fill:#1f3a5f,stroke:#0e1e33,color:#fff,font-weight:bold
    classDef reuse    fill:#e8eef7,stroke:#5b7aa6,color:#1f3a5f
    classDef govern   fill:#f0eee6,stroke:#a09578,color:#5a513a

    subgraph MODEL[OpenIM: firm-level reference model]
        direction TB
        M1["Service Domain model<br/>17 Business Domains / 171 Service Domains<br/><i>business capabilities</i>"]:::openim
        M2["Canonical entity model<br/>86 entities: core + 5 specialisation packs<br/><i>core information</i>"]:::openim
    end

    subgraph RELATED[Specialist standards and schemes]
        direction TB
        B1["FINOS CDM: products and transaction lifecycles"]:::reuse
        B2["FIBO: financial concepts and relationships"]:::reuse
        B3["Identifiers: LEI · FIGI · ISIN"]:::reuse
        B4["Messages: ISO 20022 · FIX · FpML"]:::reuse
        B5["Reporting and performance: ILPA · GIPS"]:::reuse
    end

    G1["FINOS AI Governance Framework<br/><i>external governance reference</i>"]:::govern

    M1 -.references.-> B1
    M1 -.references.-> B4
    M1 -.references.-> B5
    M2 -.aligns to.-> B2
    M2 -.uses.-> B3
    M1 -.references.-> G1

Reading the diagram

OpenIM connects a capability map to a canonical entity model.
FIBO provides financial concepts that OpenIM maps to where the meanings align.
FINOS CDM provides product and transaction-lifecycle concepts.
Identifier and message standards operate at integration boundaries.
ILPA and GIPS provide external reporting or performance rules for relevant capabilities.
The FINOS AI Governance Framework supplies an external risk and mitigation vocabulary when an implementation uses AI.

See PRIOR-ART.md for the scope and limits of each relationship.