Quick answer: Deriving a data model from OpenAPI means turning the schemas into relational entities, foreign keys, and many-to-many link tables, then generating DDL, indexes, deterministic seed data, and deployment scripts for MySQL, SQL Server, and Oracle. This closes the gap between the API contract and the database. When business logic cannot be inferred unambiguously, the result raises an open question rather than guessing.

Why the API and the database drift apart

The OpenAPI document describes the shapes the API sends and receives, while the database holds the tables and keys that persist them.…