# DATA MODELS & COLLECTIONS

[← Database Schema](./01-database-schema.md) | [Next: Demo Data Structure →](./03-demo-data-structure.md)

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Chi tiết về các Data Models đã được mô tả trong [Database Schema](./01-database-schema.md).

## Collections Overview

- **Asset Management**: Companies, Projects, Assets
- **Contract Management**: Contracts
- **O&M**: Tickets, Work Orders, PM Schedules
- **Inventory**: Inventory Items, Stock Transactions, Suppliers
- **Financial**: Budgets, Financial Transactions, Meter Readings
- **User Management**: Users, Roles
- **Audit**: System Logs, User Activity Logs
- **Documents**: Documents
- **Time-series**: Measurements, Performance Metrics

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## Relationships

- **One-to-Many**: Company → Projects → Assets
- **Many-to-Many**: Users ↔ Roles (với Scope)
- **References**: Assets reference Projects, Tickets reference Assets, etc.

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**Next**: [Demo Data Structure](./03-demo-data-structure.md)