Data Model Documentation

Create data model documentation for:

**Application:** {{APP_NAME}}
**Data Storage:** {{STORAGE_TYPE}} (SQL, NoSQL, etc.)

**Models:**
{{MODELS}}

Generate comprehensive data model documentation:

# Data Model Documentation

## Overview
- Domain description
- Key entities
- Design principles

## Entity Relationship Overview
Description of how entities relate (textual ERD)

## Models

### Model: {{MODEL_NAME}}

**Purpose:** What this model represents

**Table/Collection:** {{table_name}}

#### Fields

| Field | Type | Constraints | Description |
|-------|------|-------------|-------------|
| id | UUID | PK, NOT NULL | Unique identifier |
| field_name | string(255) | NOT NULL | Description |
| created_at | timestamp | NOT NULL, DEFAULT now() | Creation time |

#### Relationships
| Relationship | Type | Related Model | Description |
|--------------|------|---------------|-------------|
| user | belongs_to | User | The owner |
| items | has_many | Item | Associated items |

#### Indexes
| Name | Columns | Type | Purpose |
|------|---------|------|---------|

#### Validations
- Validation rules
- Business constraints

#### Lifecycle Hooks
- Before/after callbacks
- Side effects

#### Example
```json
{
  "id": "123",
  "field": "value"
}
```

---

[Repeat for all models]

## Enumerations

### EnumName
| Value | Description |
|-------|-------------|

## Common Patterns
- Soft deletes
- Timestamps
- Auditing

## Data Integrity
- Foreign key constraints
- Cascade behaviors

## Migration History
Key schema changes