The emphases of the paper are the control flow and the data flow among the SGML processing modules like lexical parsing, Syntactic parsing and semantic translation.

• 该文详细讨论Sgmltool的实现技术，重点介绍用sgmltool解释SGML语言的词法分析、语法分析及语文处理等层次的控制流和数据流.