ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files. It's widely used to build languages, tools, and frameworks. From a grammar, ANTLR generates a parser that can build and walk parse trees. CRMLS uses ANTLR to parse the rule grammar. Most of the lexer - parser grammar was obtained from the RESO specification. Some additions were required to cover missing items such as date/time and error messages.
