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The QueryGraph Stack
The QueryGraph Stack
The Definitive Guide to the Governed Semantic Lakehouse
Alexy Khrabrov and Slava Tykhonov
2026-07-14
1
Executive Summary
1.1
Links
2
The Stack: An Overview
2.1
The journey of a question
2.2
Versions and codenames
2.3
The workspace
3
Part I: The Substrate
3.1
Chapter 1. Grust: The Property Graph
3.2
Chapter 2. The Query Language: GQL/Cypher
3.3
Chapter 3. TypeSec: Capabilities as Types
3.4
Chapter 4. TypeDID: Identity, Envelopes, and the Torcello Platform
3.5
Chapter 5. LakeCat: The Iceberg REST Catalog
3.6
Chapter 6. The Bootstrap Handoff
3.7
Chapter 7. Sail and the Cypher Extension
4
Part II: QueryGraph, the Semantic Layer
4.1
Chapter 8. Semantic Croissant: What the Data Is
4.2
Chapter 9. CDIF: How the Data Is Found and Accessed
4.3
Chapter 10. DID: Who Is Acting
4.4
Chapter 11. ODRL: What Is Allowed
4.5
Chapter 12. OSI: Business Semantics
4.6
Chapter 13. Governance: The Dual Gate
4.7
Chapter 14. Lineage and Attestations
4.8
Chapter 15. The Lakehouse Path
4.9
Chapter 16. The QGLake Story: The Resilience Desk
4.10
Chapter 17. qg-python: The Pythonic Mirror
5
Part III: The Interoperability Surfaces
5.1
Chapter 18. The /v1 API and Envelope Auth
5.2
Chapter 19. MCP: One Server, Every Framework
5.3
Chapter 20. A2A, Tool Schemas, and Adapters
5.4
Chapter 21. The Governed Navigator Loop
5.5
Chapter 22. The Cross-Language Contract
6
Part IV: Integration in Practice
6.1
Chapter 23. Assembling the Lakehouse in Ten Steps
6.2
Chapter 24. End to End: Catalog to Governed Answer
6.3
Chapter 25. Live Dataverse to Governed Answer
6.4
Chapter 26. Plugging In Agent Frameworks
6.5
Chapter 27. Operating and Releasing
7
Future Work
8
Appendix: Glossary and Link Index
8.1
Glossary
8.2
Link Index