Package ebnf represents and parses a variant of Extended Backus-Naur Form called Wirth Syntax Notation. Terminal identifiers must begin with a lowercase letter. Non-terminal identifiers must begin with an uppercase letter. The first production defines the start non-terminal identifier. Terminal identifiers are assumed to be defined elsewhere. Epsilon is represented by an empty literal. Grammars are written like so: They can be parsed by Parse into a Grammar. Grammar.Validate determines whether a grammar is valid. Grammar.First and Grammar.Follow compute the first and follow sets for non-terminal identifiers. Grammar.Conflict determines whether a valid grammar can be parsed by an LL(1) parser.