Nl To Constraints

Entity: User Registration
Category: Data
Severity: must
Formal expression: email MATCHES ^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$
Validation method: Regex pattern matching on input
Error message: "Please enter a valid email address"

Scenario: [Scenario name]
  Given [precondition/context]
  When [action or event]
  Then [expected outcome]
  And [additional expectations]

Scenario: User registration with valid email
  Given a new user on the registration page
  When they enter email "user@example.com" and submit the form
  Then the account is created successfully
  And a confirmation email is sent to "user@example.com"

Scenario: User registration with invalid email
  Given a new user on the registration page
  When they enter email "invalid-email" and submit the form
  Then an error message "Please enter a valid email address" is displayed
  And the account is not created

{
  "metadata": {
    "title": "User Registration System",
    "version": "1.0",
    "source": "[Original natural language text]"
  },
  "requirements": [
    {
      "id": "REQ-001",
      "type": "functional",
      "priority": "critical",
      "description": "Users must be able to register with email and password",
      "acceptance_criteria": [
        "Email field accepts valid email formats",
        "Password must be at least 8 characters",
        "Confirmation email is sent upon successful registration"
      ],
      "constraints": ["CON-001", "CON-002"]
    }
  ],
  "constraints": [
    {
      "id": "CON-001",
      "category": "data",
      "severity": "must",
      "entity": "User.email",
      "description": "Email must be valid email format",
      "formal_expression": "^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,}$",
      "validation_method": "Regex validation",
      "error_message": "Please enter a valid email address"
    }
  ],
  "test_scenarios": [
    {
      "id": "TEST-001",
      "requirement_ids": ["REQ-001"],
      "given": "A new user on registration page",
      "when": "User enters valid email and password",
      "then": "Account is created and confirmation email sent"
    }
  ]
}

# Requirements Specification: [Feature Name]

## Requirements

### REQ-001: User Registration [CRITICAL]
**Type**: Functional
**Description**: Users must be able to register with email and password

**Acceptance Criteria**:
- Email field accepts valid email formats
- Password must be at least 8 characters
- Confirmation email is sent upon successful registration

**Related Constraints**: CON-001, CON-002

## Constraints

### CON-001: Email Validation [MUST]
**Category**: Data Constraint
**Entity**: User.email
**Description**: Email must match valid email format

**Validation**:
- Pattern: ^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$
- Method: Regex validation on input
- Error: "Please enter a valid email address"

## Test Scenarios

### TEST-001: Valid Registration
Given a new user on the registration page
When they enter email "user@example.com" and password "SecurePass123"
Then the account is created successfully
And a confirmation email is sent