Microsoft Typography | Developer information | Specifications | OpenType font development
Lao 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.

Glyph - A glyph represents the displayed form of one or more characters.

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' character is U+0E81.

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 Lao writing systems; consisting of a consonant, vowel signs and combining tone marks, or independent vowel letters.



this page was last updated 5 April 2002
© 2002 Microsoft Corporation. All rights reserved. Terms of use.
comments to the MST group: how to contact us

 

Lao OpenType Specification | Terms | Shaping | Features | Other | Appendix
Microsoft Typography | Developer information | Specifications | OpenType font development