Status: For consideration at Beijing WG2 meeting Date: 2000-03-15

This document proposes an amendment for the ISO/IEC TR 15285 “An operational model for characters and glyphs”. The amendment may have two annexes for the TR. One discusses about a “character repertoire design guidance for Syllabic Scripts ” and another discusses about a “recommended functionality for supporting sophisticated input assistance”. Both annexes are independent to each other but have strong interrelation between the two. Problem description: 1. Most of the syllabic scripts needs to have a rendering process of a string of multiple coded elements for presentation of them. And also, sometimes, a string unit of the coded elements should be handled as if it is one single character for data processing purpose, and sometimes it requires a single normalized sequence of the coded elements (for processing, such as sorting) even though human being would type-in the sequence differently. Therefore, there is a needs of well-defined “processing unit of coded elements ” to handle the most of the syllabic scripts for machine process and presentation purposes. In addition to that, even though the “unit ” is defined, glyph shape is not always defined as one shape. Sometimes, there are multiple candidate shapes are available for the one singl