# 5 Notational Conventions

- [5.1 Syntactic and Lexical Grammars](/ecmascript-language-specification-cn/5-notational-conventions/5.1-syntactic-and-lexical-grammars.md)
- [5.1.1 Context-Free Grammars](/ecmascript-language-specification-cn/5-notational-conventions/5.1-syntactic-and-lexical-grammars/5.1.1-context-free-grammars.md)
- [5.1.2 The Lexical and RegExp Grammars](/ecmascript-language-specification-cn/5-notational-conventions/5.1-syntactic-and-lexical-grammars/5.1.2-the-lexical-and-regexp-grammars.md)
- [5.1.3 The Numeric String Grammar](/ecmascript-language-specification-cn/5-notational-conventions/5.1-syntactic-and-lexical-grammars/5.1.3-the-numeric-string-grammar.md)
- [5.1.4 The Syntactic Grammar](/ecmascript-language-specification-cn/5-notational-conventions/5.1-syntactic-and-lexical-grammars/5.1.4-the-syntactic-grammar.md)
- [5.1.5 Grammar Notation](/ecmascript-language-specification-cn/5-notational-conventions/5.1-syntactic-and-lexical-grammars/5.1.5-grammar-notation.md)
