# Text Validation

## Purpose
This capability determines if content represents meaningful text, preventing the processing of binary data as text which could lead to errors or corruption.

## Requirements

### Requirement: Heuristic Validation
The system SHALL validate decoded text content using heuristics such as the ratio of printable characters and control characters.

Priority: High

#### Scenario: Validate text
- **WHEN** decoded text is analyzed
- **THEN** it is classified as valid text only if it meets configured heuristics (e.g., sufficient printable characters)

### Requirement: Profile Support
The system SHALL support configurable profiles for textual validation to handle different definitions of "valid text" (e.g., terminal safe, printer safe).

Priority: High

#### Scenario: Use profile
- **WHEN** validating text with a specific profile
- **THEN** the validation logic respects the profile's allowed and rejected character sets