¶ Domains of Interoperability in Fuse
In the eTag Fuse platform, Domains of Interoperability define the functional scope of what interoperates. Each domain represents a bounded unit of behavior — such as AI execution, identity governance, or workflow orchestration — that can be composed, governed, extended, and reused as part of dynamic, cross-domain solutions.
Domains are the building blocks of operational logic. They provide the structure needed to support real-world workflows, compliance enforcement, system integrations, AI coordination, and user-facing interactions.
Unlike traditional platforms where functionality is embedded in siloed features or external tools, Fuse treats each domain as a pluggable, first-class citizen — governed by platform policies and orchestrated using the Layers of Interoperability.
For a complete explanation of how layers and domains interact, see the Interoperability Model.
¶ Why Domains Matter
Each domain in Fuse brings specific capabilities that contribute to composable, policy-aware digital ecosystems. These domains:
- Define purpose — Specify what capabilities are being orchestrated (e.g., AI, messaging, UI, security)
- Enable modular reuse — Let logic, forms, APIs, and policies be reused across flows and teams
- Support governance — Enforce policy, access, and visibility within and across flows
- Promote extensibility — Let developers securely build new domain functionality using frameworks
¶ Core Interoperability Domains
¶ Security, Governance & Trust
Governs identity, access control, policy enforcement, risk mitigation, and secure execution across workflows, AI actions, and system interactions. It ensures runtime compliance, delegated approval, explainability, and traceability for every identity and action.
Capabilities:
- Federated Identity and SSO (SCIM, SAML, OIDC)
- Role-Based and Risk-Based Access Control (RBAC, RiBAC)
- Policy Templates, Runtime Rules, and Approvals
- Session Management, Token Lifecycle, and Access Scopes
- Delegated Access and Identity Verification
- IP Rules, Security Groups, and Permission Sets
- Audit Logging, Redaction, and SIEM Forwarding
- Certificate and Question-Based Authentication
Learn more: Explore the Security, Governance & Trust domain
¶ Intelligence & AI
Operationalizes models, assistants, and inference logic as explainable, governed participants in orchestrated decision-making.
Capabilities:
- AI Assistants and Agents
- Prompt Execution and Tool Routing
- Explainable AI and Bias Detection
- Predictive Analytics and Model Inference
- Feedback Loops and Human Escalation
- AI Threads and Session Management
- Model Observability (Cost, Drift, Accuracy)
- AI Toolkits, SDKs, and Fine-Tuning Support
Learn more: Explore the Intelligence & AI domain
¶ Workflow & Pipeline
Provides the orchestration logic that coordinates tasks, services, systems, and roles across domains.
Capabilities:
- Visual Workflow Designer
- Pipeline Execution and Scheduling
- Event, Manual, and Timed Triggers
- Human-in-the-Loop Steps and Escalations
- Retry Logic, Compensation, and Rollback
- RPA Support for Attended/Unattended Bots
- Versioning and Reusability of Workflows
Learn more: Explore the Workflow & Pipeline domain
¶ Interaction & UI
Delivers user-facing components and interactive elements that respond to role, runtime state, and orchestration context.
Capabilities:
- Workspaces and Contextual Environments
- UI Panels, Pages, and Forms
- Shortcuts, Menus, and Navigational Aids
- Personalization and Preferences
- Themes, Accessibility, and Styling
- Global Banners and Startup Pages
Learn more: Explore the Interaction & UI domain
¶ Applications
Registers, launches, and governs both internal and third-party apps with secure access control and session integration.
Capabilities:
- App Registration and Metadata
- App Launcher and Navigation Integration
- SSO Session Management
- Application Proxies and API Gateways
- CORS and Cross-Domain Policy Enforcement
- Application Access Policies
Learn more: Explore the Applications domain
¶ Observability
Enables real-time monitoring, traceability, and system introspection for all domains and execution layers.
Capabilities:
- Structured Logs and Domain-Level Filtering
- Workflow Execution Traces and Snapshots
- Metrics Collection and Dashboarding
- Telemetry Streaming and Alert Triggers
- Audit and Debugging Tools
Learn more: Explore the Observability domain
¶ Discoverability
Enhances system intelligence and user experience through search, tagging, and smart cross-domain discovery.
Capabilities:
- Semantic and Contextual Search
- Cross-Domain Resource Discovery
- Tagging, Labeling, and Filtering
- Shortcut and Launcher Indexing
- Smart Suggestions and Relevance Ranking
Learn more: Explore the Discoverability domain
¶ Data & Storage
Manages structured runtime state, files, and encrypted data as part of orchestrated and policy-bound execution.
Capabilities:
- Structured Data Storage and Access
- Blob and File Management
- Indexed Document and Log Stores
- File Metadata and Versioning
- Data Encryption and Access Policies
Learn more: Explore the Data & Storage domain
¶ Routing & APIs
Defines how Fuse exposes and manages endpoints, routes, and external-facing interfaces.
Capabilities:
- HTTP/API Route Registration
- Webhook Endpoint Handling
- API Scopes and Rate Limits
- Gateway Request Transformation
- Internal vs. External Access Routing
Learn more: Explore the Routing & APIs domain
¶ Runtime & Execution
Controls the lifecycle of orchestrated components, environment segmentation, and deployment contracts.
Capabilities:
- Assembly and Package Management
- Environment Contexts (Test, Sim, Prod)
- Execution Contracts and Constraints
- Runtime State Isolation and Monitoring
Learn more: Explore the Runtime & Execution domain
¶ Knowledge
Supports vector search, embedding pipelines, and semantic retrieval for contextual AI and human workflows.
Capabilities:
- Vector Store and Embedding Pipelines
- Semantic Indexing of Documents
- Scoped Knowledgebase Access
- Curated Source Management
- Integration with AI Tools and Assistants
Learn more: Explore the Knowledge domain
¶ Resources
Represents abstract content items — such as files, URLs, text, pipeline outputs, or knowledge base results — that can be attached, injected, cached, or reused at runtime.
Capabilities:
- Resource Registry and Metadata
- File, Text, URL, and Output Bindings
- Runtime Resource Injection and Referencing
- Scoped Resource Access by Role or Flow
- Caching, Versioning, and Tagging of Content
- Credential or API Resource Management
Learn more: Explore the Resources domain
¶ Explore More
Interoperability Model — How execution layers and domains work together
Interoperability Layers — The four-layer execution engine of Fuse
Development Frameworks — Learn how to extend or create your own domain functionality
Next: Use Cases — Explore real-world examples of how domains collaborate across workflows.