Data Models

Type	Level	UID	PREFIX	REFS	Title	Statement	Rationale	Comment
TEXT						Data Models define what information the system knows: entities, attributes, relationships, constraints, and lifecycle rules. Technology-agnostic. The physical database schema is the implementation of these requirements and lives in your codebase as migrations or DDL. UID prefix: DATA- Traces up to: Features (FEAT-) Implemented by: Database migrations and ORM models
REQUIREMENT	1	DATA-000		Parents: FEAT-000 Feature Template	DATA-000 Data Entity Template	The system shall maintain [Entity Name] records with: Attributes: - [attribute]: [type] [constraints] Relationships: - [belongs to / has many] [Other Entity] Constraints: - [uniqueness, validation rules] Lifecycle: - Created when: [event] - Deleted when: [event or retention policy] Volume estimate: [expected record count] Sensitive data: [yes/no]