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This IDC Perspective examines the maturation of open table formats as the default foundation for enterprise data platforms and the governance challenges that have emerged above the storage layer. The document covers the open table format landscape, the emerging Open Semantic Interchange standard, catalog interoperability dynamics, and the implications of agentic AI for data consistency and semantic governance."Open table formats have settled the storage question. The harder work is now above the format layer, governing catalogs, anchoring semantic definitions, and ensuring that AI agents query data that is consistent, trusted, and auditable," said Marlanna Harrington, senior research analyst, Data Platforms, IDC.

Executive Snapshot

• Key takeaways
• Recommended actions

Situation Overview

• Lakehouse architecture matures
• The format landscape: Convergence without a single winner
• Performance and interoperability: A mandate, not a trade-off
• The consolidation paradox
• Open Semantic Interchange: The next layer of the stack
  • What is OSI?
  • OSI's momentum and its gaps
  • The catalog wars: Who governs the open stack?
• The architectural challenges openness has not yet solved
• Agentic AI changes the interoperability stakes

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