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  • Notation

Concrete-syntax

Concrete syntax of ABNF.

The concrete syntax of ABNF is specified, in [RFC:4], using ABNF concrete syntax. We break the circularity by formalizing the concrete syntax of ABNF using the abstract syntax of ABNF.

Subtopics

Parse-grammar*
Parse a sequence of natural numbers as an ABNF grammar.
Core-rules
Core rules of ABNF.
Concrete-syntax-validation
Validation of the concrete syntax grammar.
*grammar*
Grammar of ABNF.
Concrete-syntax-rules
Rules that specify the concrete syntax of ABNF.