¶ Domains of Interoperability
In the eTag Fuse Platform, Domains of Interoperability define the functional scopes that collaborate at runtime.
Each domain represents a modular, governable unit of capability — such as AI orchestration, identity governance, workflow execution, storage, or messaging — that can be composed, secured, and extended.
Domains are the building blocks of explainable orchestration.
They provide the modular structure needed to support secure workflows, dynamic AI, human approvals, system interoperability, and real-time messaging — all under policy control.
Unlike traditional platforms that hardwire functionality into siloed modules, Fuse treats each domain as a pluggable, policy-governed actor — orchestrated dynamically through the Layers of Interoperability.
To understand how layers and domains interact at runtime, see the Interoperability Execution Model.
¶ Why Domains Matter
Each domain brings specific capabilities to Fuse’s composable digital fabric:
- Define purpose — What functionality participates (AI, storage, messaging, security, etc.)
- Enable modular reuse — Compose flows, services, and orchestrations across domains
- Enforce governance — Apply security, policy, and audit enforcement per domain
- Support extensibility — Allow developers to extend and customize domain behavior securely
Domains make workflows, AI, human decisions, and systems work together explainably and governably.
¶ Core Domains of Interoperability
¶ 
Security
Governs identity, access control, token orchestration, and risk enforcement across all flows and domains.
Capabilities:
- Federated Identity and SSO (SAML, SCIM, OIDC)
- Role-Based Access Control (RBAC) and Risk-Based Access Control (RiBAC)
- Scoped Token Management and Policy Enforcement
- Session and Credential Governance
- Approval Chains, Access Reviews, and Audit Trails
Learn more: Explore the Security domain
¶ 
Intelligence
Operationalizes AI models, agents, and inference tools as explainable, governed runtime participants.
Capabilities:
- AI Assistant Orchestration
- Prompt Routing and Execution
- Explainability, Bias Detection, and Session Management
- Feedback Loops and Escalation to Human Review
- AI Observability (Cost, Drift, Accuracy Metrics)
Learn more: Explore the Intelligence domain
¶ 
Knowledge
Enables retrieval, embedding, and contextual access to structured information, knowledge bases, and runtime artifacts.
Capabilities:
- Document Retrieval and Embedding Pipelines
- Semantic Indexing for AI and Workflow Context
- Scoped Knowledge Source Management
- Cross-Domain Context Injection for AI/Workflows
- Governance over Knowledge Access and Retention
Learn more: Explore the Knowledge domain
¶ 
Workflow
Coordinates task execution, approvals, retries, human-in-the-loop flows, and policy-driven orchestration.
Capabilities:
- Visual Workflow Builder and Scheduler
- Escalation Paths, Human Task Routing
- Retry, Compensation, and Version Control
- Event-Triggered and Manual Workflow Launch
- Multi-Domain Coordination and Approvals
Learn more: Explore the Workflow domain
¶ 
UI
Delivers contextual, role-based user interfaces for task execution, data entry, approvals, and workflow interactions.
Capabilities:
- Workspaces, Dashboards, and Forms
- Role-Adaptive Navigation and Visibility
- Personalized Task Views and Contextual Panels
- Accessibility, Theming, and User Preference Management
- Dynamic Rendering Based on Runtime State
Learn more: Explore the UI domain
¶ 
Applications
Registers, launches, and governs access to internal and third-party applications inside orchestrated workflows.
Capabilities:
- App Registration, Metadata Management
- Secure App Launchers and Single Sign-On
- Proxy Gateways and API Protection
- Cross-Domain Application Access Control
- Session Context Propagation Across Apps
Learn more: Explore the Applications domain
¶ 
Messaging
Enables real-time workflow messaging, inbox actions, system alerts, and cross-domain communication.
Capabilities:
- Workflow Inbox Generation
- Notification Triggers from System and User Events
- Alert Routing and Multi-Channel Messaging (SMTP, SMS, Slack)
- Scoped Message Delivery (by Domain, Role, Tenant)
- Template-Driven Notification Management
Learn more: Explore the Messaging domain
¶ 
Routing
Defines how Fuse exposes workflows, APIs, and external integration points via dynamic routing and governance.
Capabilities:
- REST, WebSocket, and Webhook Entry Points
- API Gateway Registration and Management
- Internal vs External Route Enforcement
- Scoped Access Policies for APIs
- Adaptive Routing Based on Workflow Context
Learn more: Explore the Routing domain
¶ 
Storage
Manages content resources, file storage, runtime-generated artifacts, and dynamic pipeline outputs.
Capabilities:
- File and Blob Storage Integration
- Runtime Resource Management and Referencing
- Secure Content Injection into Workflows and UIs
- Storage Provider Extensibility
- Data Caching, Versioning, and Policy Enforcement
Learn more: Explore the Storage domain
¶ 
System
Orchestrates runtime environments, containerized deployments, and composable runtime components.
Capabilities:
- Runtime Environment Isolation (Dev, Test, Prod)
- Containerization and Deployment Packaging
- Metadata-Driven Execution Contexts
- Artifact Management and Modular Component Loading
Learn more: Explore the System domain
¶ 
Visibility
Provides monitoring, audit, telemetry, discovery, and runtime introspection across domains and workflows.
Capabilities:
- Structured Logging and Execution Tracing
- Metric Collection, Observability Pipelines
- Telemetry Dashboards and Alert Thresholds
- Semantic Search and Cross-Domain Indexing
- Traceable Context Playback for Workflows and AI Sessions
Learn more: Explore the Visibility domain
¶ Explore More
- Interoperability Execution Model — Understand how domains and execution layers combine.
Execution Layers — The structured execution path: Integration ? Automation ? Orchestration ? Interoperability.
Development Frameworks — Extend domains and workflows securely through modular frameworks.
Next: Use Cases — Explore real-world examples of domain collaboration across workflows, AI, messaging, and security.