# Pattern Syntax

## Table of Contents

- Introduction
- Delimiters
- Meta-characters
- Escape sequences
- Unicode character properties
- Anchors
- Dot
- Character classes
- Alternation
- Internal option setting
- Subpatterns
- Repetition
- Back references
- Assertions
- Once-only subpatterns
- Conditional subpatterns
- Comments
- Recursive patterns
- Performance

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