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Mongolian 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 Mongolian letter 'A' is U+1820. A character may have multiple forms of glyphs.

Format controls - special formatting characters used in the shaping process of Mongolian scripts (U+180B, U+180C, U+180D, U+180E, U+200c, U+200D and U+200F). These characters have no visual appearance, except when an application display zero width glyphs.

Glyph - A glyph represents a form of one or more characters. For example the final, initial and medial glyphs of the Mongolian letter 'A' are all forms of that character.

Ligature - A combination of glyphs that join to form a single glyph. For example the 'Ba A' ligature.



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