¶ Fuse Interoperability Execution Model
The Fuse Interoperability Model defines the architecture that powers governed collaboration across systems, domains, AI, workflows, and human interactions.
It distinguishes two critical constructs:
- Execution Layers — how logic runs across Fuse
- Domains of Interoperability — what capabilities interoperate during execution
Together, they enable composable, explainable, policy-driven digital ecosystems.
¶ 1. Why an Interoperability Model Is Needed
True interoperability goes beyond simple API connections or automation scripts.
It means:
- Systems collaborate with shared meaning and governed trust
- Domains (Security, Intelligence, UI, etc.) work together dynamically
- Execution is explainable, recoverable, and policy-aligned
The model helps:
- Architects design multi-domain solutions
- Developers compose workflows, pipelines, and orchestrations
- Organizations evolve from siloed systems to governed ecosystems
Interoperability is not a feature. It’s an architectural capability — embedded into every action, decision, and collaboration.
¶ 2. The Execution Layers in Fuse
Fuse defines four Execution Layers that govern how actions and decisions happen:
| Layer | Description | Examples |
|---|---|---|
| Integration Layer | Connect systems, APIs, events, and data sources | REST APIs, SQL, Webhooks, Message Queues |
| Automation Layer | React to events or rules with stateless actions | Pipelines, Triggers, Scheduled Jobs |
| Orchestration Layer | Coordinate multi-step, stateful workflows | Approvals, Human Tasks, Compensation |
| Interoperability Layer | Govern trust, context propagation, and policy enforcement across domains | Token chaining, Federated identity, AI decision routing |
Each layer builds on the previous, adding governance, structure, and adaptability.
¶ 3. The Domains of Interoperability
Domains define what interoperates inside Fuse.
Each domain provides a modular, pluggable capability — composable inside workflows, automations, and orchestrations.
| Domain | Role |
|---|---|
| Security | Govern identity, access, token scopes, and policy enforcement |
| Intelligence | Enable AI models, tools, agents, and retrieval orchestration |
| Knowledge | Manage structured information, embeddings, and dynamic content artifacts |
| Workflow | Define multi-step orchestrations, approvals, and escalations |
| UI | Enable dynamic forms, dashboards, workspaces, and human interaction |
| Applications | Integrate external apps and launchers with governance |
| Messaging | Route notifications, pub/sub events, and communication flows |
| Routing | Adapt webhooks, APIs, and connectors dynamically |
| Storage | Manage content resources (files, blobs, URLs) across workflows |
| System | Enable runtime package management, variables, nodes, and environment settings |
| Visibility | Monitor execution, audit events, and enable intelligent discovery and search |
Each domain is:
Composable
Governed
Observable
Extensible
Domains aren’t passive modules — they are governed runtime participants.
Explore the Domains of Interoperability
¶ 4. How Layers and Domains Work Together
In Fuse:
- Layers handle execution — how logic, flows, and actions happen
- Domains provide capabilities — what services, policies, and tools participate
¶ Example: AI Fraud Detection Flow
- Integration Layer — Webhook from tax system triggers detection
- Automation Layer — Pipeline evaluates initial risk factors
- Orchestration Layer — Human-in-the-loop approval if high-risk
- Interoperability Layer — Secure token propagation, explainability, fallback
Participating Domains:
- Intelligence — AI model inference
- Security — Role and policy enforcement
- Workflow — Approvals and escalation paths
- UI — Reviewer dashboards and exception handling
- Messaging — Notify stakeholders and log outcomes
- Visibility — Audit all decisions and outcomes
Execution flows through layers.
Capabilities are provided by domains.
¶ 5. Visualizing the Interoperability Model
Imagine a two-dimensional grid:
- Horizontal Axis (Execution Layers) — Integration ? Automation ? Orchestration ? Interoperability
- Vertical Axis (Domains) — Functional capabilities like Security, AI, UI, Messaging, etc.
Each “intersection” defines an explainable, governable collaboration between systems, users, AI models, and workflows.
This model ensures:
- Systems are composed, not stitched manually
- AI is explainable and governed alongside humans
- Access, trust, and security are propagated automatically
- Workflows remain observable, auditable, and adaptable
¶ 6. Why This Model Enables Strategic Interoperability
Fuse doesn’t hardwire features.
It builds:
- Execution as layers — Governed from connection to collaboration
- Capabilities as domains — Pluggable, composable, extensible participants
- Governance as foundation — Token scopes, audit trails, runtime policies
This makes Fuse ideal for:
- Federated identity and cross-organization workflows
- AI orchestration and explainability
- Regulatory compliance and risk-managed operations
- Rapid, governed composition of digital ecosystems
¶ 7. Related Concepts
- Layers of Interoperability — Execution flow and runtime layering
- Domains of Interoperability — What services and capabilities interoperate
- Interoperability Maturity Model — How to evolve toward full composability
- Interoperability Roadmap — Strategic phases for adoption and scaling
“Interoperability isn’t when systems talk.
It’s when they collaborate — with trust, purpose, and governance.”
— eTag Fuse Interoperability Philosophy