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Here’s a clear, polished description you can use for “Pillar 6: Data Integration & Interoperability”:

Pillar 6: Data Integration & Interoperability

Overview:
This pillar ensures seamless, secure, and scalable connectivity across systems, applications, and data sources. By combining an API‑first approach with event-driven patterns and robust data pipelines, the organization achieves real-time data flow, consistent interfaces, and resilient integrations across both modern and legacy environments.

Who:
Integration Architects: Define integration strategy, API specifications, messaging patterns, and connectivity standards.
API Developers: Build and maintain RESTful APIs and GraphQL endpoints, with comprehensive documentation and governance.
Data Engineers: Implement real-time synchronization, ETL/ELT pipelines, and data virtualization to unify and operationalize data.

What:
Comprehensive Integration Framework: Supports multiple connectivity patterns (synchronous APIs, asynchronous events, batch pipelines) to meet diverse business and technical needs.
API Management: Consistent API design, lifecycle management, documentation, versioning, and security across REST and GraphQL.
Real-time Synchronization: Change data capture (CDC) and event streaming enable low-latency, high-throughput data movement.
Legacy Integration: ETL/ELT processes and data virtualization bridge older systems with modern platforms without disruptive rewrites.

How:
Architecture: API-first design underpinned by event-driven integration and an enterprise service bus (ESB) where appropriate for routing, transformation, and orchestration.
Platforms and Tools:
API Gateway: Kong, Apigee, or Azure API Management for authentication, rate limiting, monitoring, and developer portals.
Event Streaming: Confluent Kafka, Apache Pulsar, or AWS Kinesis for durable, scalable stream processing and pub/sub.
Data Pipelines: ETL/ELT with Informatica PowerCenter, Talend, or Fivetran to ingest, transform, and load data across sources.
Practices:
Standardized API specifications (OpenAPI/Swagger, GraphQL schemas) and messaging contracts (Avro/JSON/Protocol Buffers).
Versioning, backward compatibility, and deprecation policies to minimize integration friction.
Security by design: OAuth2/OIDC, mTLS, secrets management, and fine-grained access controls.
Observability: Centralized logging, distributed tracing, metrics, and SLAs across APIs and data streams.
Governance: Cataloging, lineage, and compliance aligned to data privacy and regulatory requirements.

Outcomes:
Faster integration delivery and reduced coupling between systems.
Reliable real-time data availability for analytics and operations.
Consistent developer experience and reusable integration assets.
Future-proof connectivity that accommodates new services and legacy modernization.