Microsoft Typography | Developer information | Specifications | OpenType font development
	Thai OpenType Specification | Terms | Shaping | Features | Other | Appendix
		Terms The following terms are useful for understanding the layout features and script rules discussed in this document. Base Glyph - Any glyph that can have a diacritic mark above or below it. Layout operations are defined in terms of a base glyph, not a base character, as a ligature may act as the base. Character - Each character represents a Unicode character code point. For example the 'ko kai' character is U+0E01. Combining Mark - A vowel sign or tone mark which is positioned above or below a character to provide pronunciation guidance. Cluster - the effective "unit" of Thai writing systems; consisting of a consonant, vowel signs, combining tone marks, and independent vowel letters. Glyph - A glyph represents a form of one or more characters. this page was last updated 25 February 2002 © 2001 Microsoft Corporation. All rights reserved. Terms of use. comments to the MST group: how to contact us
	Thai OpenType Specification | Terms | Shaping | Features | Other | Appendix
	Microsoft Typography | Developer information | Specifications | OpenType font development