Grammar and role for metadata entities: data types, column names, schema names, etc.

EBNF grammar and interpreters.

A system of functional parsers (combinators, transformers, generators.)

extended log format log parser

Grammar for parsing Mermaid-JS language specs and converting them to specs of Graphviz DOT, JSON, PlantUML, Raku, or Wolfram Language.

Text::SubParsers is for extracting and processing of interpret-able sub-strings in texts

Parse duration strings into seconds

a basic parser of vCard

Grammar and role for metadata entities: data types, column names, schema names, etc.

Parsing getopt and argparser parameter specs.