针对藏文编码字符集的基本集和辅助集建立在不同平面、编码体系不同所存在的问题,本文提出建立藏文内码扩展体系,给出了藏文合成、生成、分解的规则和方法:通过内码转换表合成藏文藏文内字,实现基本集与辅助集的信息交换;通过构件集,生成规范、标准的藏文外字,满足藏文编码字符集开放性的需要。并且,向上,在字汇一级,兼容UCS ;向下,与GB2312的事实上的内码标准兼容,是一个全藏文编码体系。 作者建议在UCS基本平面的拼音文字区建立内码扩充体系。

For the existing problem in Basic sets and auxiliary sets builed on different plane and different system of the tibetan coded character sets ,We Present an extended tibetan coded character system - - Full Tibetan Coded Character System. In this paper ,we have also given the rule and method for composing and decomposing of the tibetan and ,implemented the information interchanging between the Basic sets and auxiliary sets by means of internal , code converting table. This new system can produce the normal and standard external tibetan word by means of component sets and ,it is cmpatible with UCS and GB2312. The author suggests building the extended Code Character system in the A - zone of the Basic multiligual plane.