Python Dataclasses and PydanticPREMIUM

Create data models for: [DESCRIBE YOUR DATA]

Data structure:
```
[DESCRIBE YOUR FIELDS AND TYPES]
```

Requirements:
- Validation: [NONE/BASIC/STRICT]
- Serialization: [JSON/DICT/BOTH]
- Immutability: [YES/NO]
- Default values: [DESCRIBE]

Provide:
1. dataclasses implementation
2. Pydantic BaseModel equivalent
3.…