Project ARIES. SDL -- A String Description Language

摘要

SDL (String Description Language) is a recursive language which is used to define the structures of strings of ASCII characters. It permits implicit and explicit definition of strings, and it can be generally used to describe almost any language or set of strings. Derived from BNF and Extended BNF, it contains many features from these languages as well as several extensions made by the author. SDL may be used to describe context free languages. (Author)