Ralf Lämmel, Vadim Zaytsev. An Introduction to Grammar Convergence. In Michael Leuschel, Heike Wehrheim, editors, Integrated Formal Methods, 7th International Conference, IFM 2009, Düsseldorf, Germany, February 16-19, 2009. Proceedings. Volume 5423 of Lecture Notes in Computer Science, pages 246-260, Springer, 2009.
Grammar convergence is a lightweight verification method for establishing and maintaining the correspondence between grammar knowledge ingrained in all kinds of software artifacts, e.g., object models, XML schemas, parser descriptions, or language documents. The central idea is to extract grammars from diverse software artifacts, and to transform the grammars until they become syntactically identical. The present paper introduces and illustrates the basics of grammar convergence.