基于ISO/IEC 10646和UNICODE国际标准,用传统的字体技术(如TrueType)来实现少数民族文字处理所面临的一个“瓶颈”问题是:“变形显现字符”不存在确定的码位。这也是多年来民文系统重复开发、互不兼容的根本原因。本文基于ICU的文字处理体系结构,阐述了完全支持Unicode标准的少数民族文字(本文主要指蒙古文字、维文、藏文等)的实现方法。文中首先介绍了少数民族文字的特点,分析其与拉丁文、汉字在计算机输入、输出过程中的不同之处,并指出少数民族文字处理的难点。其次介绍了一种能满足少数民族文字处理需求的字体技术——OpenType。最后,阐述了文字处理引擎的工作原理,以及ICU中如何实现对少数民族文字的支持。

As we process minority scripts in computers based on ISO/IEC 10646 and Unicode standards , there is a bottle - neck problem that variations of presentation characters have no definite code points. It is why many software systems processing minority scripts are produced in repetition and are incompatible with each other. Based on scripts processing architecture in ICU , this paper illustrates methods of implementation of minority scripts processing complying with Unicode standard. Firstly , we analyze the characteristics of minority scripts , and point out the difficulties of processing them. Then the OpenType font technology , which can satisfy the requirements of minority languages processing , is introduced. Lastly , we illuminate the principle of Layout Engine , as well as present how to embed minority scripts processing in ICU.