A tool suite to support the development of specifications written in the ASFandSDF formalism. It includes * parser and parser generator * a structure editor * an interpreter for TermRewriting systems, * a compiler to translate TermRewriting systems to the CProgrammingLanguage * and an interactive programming environment called the ASF + SDF Meta-Environment. The Meta-Environment supports editing specification modules and instantenous testing of the programming environment generated from an ASF+SDF specification. See * http://www.cwi.nl/projects/MetaEnv ---- CategorySystem