Bol processor grammars
Bernard W. Bell, Jim Kippen · 1992
Processor grammars are an extension of unrestricted generative grammars allowing a simple representation of string patterns, here taken to mean repetitions and homomorphic transformations. These have been successfully applied to the simulation of improvisatory techniques in traditional drum music, using a production-rule system called Bol Processor BP1. The basic concepts and parsing techniques of BP1 are presented. A new version of Processor, namely BP2, has been designed to serve as a aid to rule-based composition in contemporary music. Extensions of the syntactic model, such as metavariables, remote contexts, substitutions and programmed grammars, are briefly introduced.