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Telugu OpenType Specification | Terms | Shaping | Features | Other | Appendix

Appendix A: Writing system tags

Features are encoded according to both a designated script and language system. Currently, the Uniscribe engine only supports the "default" language for each script. However, font developers may want to build language specific features which are supported in other applications and will be supported in future Microsoft OpenType implementations.

* NOTE: It is strongly recommended to include the "dflt" language tag in all OpenType fonts because it defines the basic script handling for a font. The "dflt" language system is used as the default if no other language specific features are defined or if the application does not support that particular language. If the "dflt" tag is not present for the script being used, the font may not work in some applications.

The following tables list the registered tag names for scripts and language systems.

Registered tags for the Telugu script Registered tags for Telugu language systems
Script tag Script Language system tag Language
"telu" Telugu "dflt" *default script handling
"TEL " Telugu

Note: both the script and language tags are case sensitive (script tags should be lowercase, language tags are all caps) and must contain four characters (ie. you must add a space to the three character language tags).

Appendix B: Consonant forms

The following table shows all consonant forms that Uniscribe recognizes. For example, if a consonant is marked as having a post-base form and is the last consonant in a syllable, Uniscribe will apply the "pstf" feature to it, etc.

In the table, consonants that have a reph form, below-base form and post-base form will have a check mark in those columns. All consonants are expected to have a half form, which can be a combination of the full form and a virama (halant).

Consonant Unicode codepoint Reph form Below-base form Post-base form
Ka U+0C15 X
Kha U+0C16 X
Ga U+0C17 X
Gha U+0C18 X
Nga U+0C19 X
Ca U+0C1A X
Cha U+0C1B X
Ja U+0C1C X
Jha U+0C1D X
Nya U+0C1E X
Tta U+0C1F X
Ttha U+0C20 X
Dda U+0C21 X
Ddha U+0C22 X
Nna U+0C23 X
Ta U+0C24 X
Tha U+0C25 X
Da U+0C26 X
Dha U+0C27 X
Na U+0C28 X
Nnna U+0C29
Pa U+0C2A X
Pha U+0C2B X
Ba U+0C2C X
Bha U+0C2D X
Ma U+0C2E X
Ya U+0C2F X
Ra U+0C30 X
Rra U+0C31
La U+0C32 X
Lla U+0C33 X
Llla U+0C34
Va U+0C35 X
Sha U+0C36 X
Ssa U+C937 X
Sa U+0C38 X
Ha U+0C39 X

Appendix C: a sample OpenType font

Microsoft intends to make a sample font available in the future. Please watch for announcements here, the OpenType list or on the VOLT community site.

this page was last updated 21 March 2002
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Telugu OpenType Specification | Terms | Shaping | Features | Other | Appendix
Microsoft Typography | Developer information | Specifications | OpenType font development