FONTLOG
Akatab and Tirra
======

This file provides detailed information on the Akatab and Tirra font families. 
This information should be distributed along with the Akatab and/or Tirra fonts 
and any derivative works.


Basic Font Information
----------------------

Akatab is a TrueType font for the Tifinagh script with smart font capabilities 
added using state-of-the-art font technologies. This means that complex 
typographic issues such as the placement of combining marks or the formation 
of ligatures are handled by the font, provided you are running an application 
that provides an adequate level of support for one of these smart font 
technologies.

Six weights for this typeface family are included:

     * Akatab Regular
     * Akatab Medium
     * Akatab SemiBold
     * Akatab Bold
     * Akatab ExtraBold
	 * Akatab Black

Tirra is a TrueType font for the Tifinagh script. It is a subset of 
Akatab specifically for languages using Neo-Tifinagh. 

Six weights for this typeface family are included:

     * Tirra Regular
     * Tirra Medium
     * Tirra SemiBold
     * Tirra Bold
     * Tirra ExtraBold
	 * Tirra Black

The Latin glyphs are based on the OFL-licensed Source Sans Pro fonts
(https://github.com/adobe-fonts/source-sans-pro). 

For detailed documentation see the contents of the 'documentation' folder.

ChangeLog
---------
(This should list both major and minor changes, most recent first.)

05 June 2025	(SIL WSTech team) Akatab and Tirra version 4.100
- Fixed a composite reference for the ligature of YAB and LABIALIZATION MARK
- Added the Tirra font family, a Neo-Tifinagh subset of the Akatab fonts

17 Feb 2025	(SIL WSTech team) Akatab version 4.000
- Added Tifinagh characters to complete the Unicode block: 
    - U+2D32 TIFINAGH LETTER YABH
    - U+2D35 TIFINAGH LETTER BERBER ACADEMY YAJ
    - U+2D3A TIFINAGH LETTER YADDH
    - U+2D3B TIFINAGH LETTER YEY
    - U+2D3D TIFINAGH LETTER YAK
    - U+2D3F TIFINAGH LETTER YAKHH
    - U+2D41 TIFINAGH LETTER BERBER ACADEMY YAH
    - U+2D43 TIFINAGH LETTER YAHH
    - U+2D44 TIFINAGH LETTER YAA
    - U+2D45 TIFINAGH LETTER YAKH
    - U+2D47 TIFINAGH LETTER YAQ
    - U+2D4A TIFINAGH LETTER YAZH
    - U+2D52 TIFINAGH LETTER YAP
    - U+2D55 TIFINAGH LETTER YARR
    - U+2D56 TIFINAGH LETTER YAGH
    - U+2D5D TIFINAGH LETTER YATH
    - U+2D5E TIFINAGH LETTER YACH
    - U+2D60 TIFINAGH LETTER YAV
    - U+2D61 TIFINAGH LETTER YAW
    - U+2D65 TIFINAGH LETTER YAZZ
    - U+2D66 TIFINAGH LETTER YE
    - U+2D6F TIFINAGH MODIFIER LETTER LABIALIZATION MARK
- Added Neo-Tifinagh variants of existing encoded characters into the font: 
    - TIFINAGH LETTER YA
    - TIFINAGH LETTER YAF
    - TIFINAGH LETTER YAL
    - TIFINAGH LETTER YU
    - TIFINAGH LETTER YASS
    - TIFINAGH LETTER YASH
    - TIFINAGH LETTER YAT 
 - Added the capital Schwa to support case swapping with lowercase schwa
    - U+018F LATIN CAPITAL LETTER SCHWA
- Added features cv18 and ss18 to access Neo-Tifinagh characters
- Added TAQ, THV and TTQ language tags
- Added 'locl' features and lookups corresponding to language tags

09 Feb 2023 (SIL WSTech team) Akatab version 3.000
- Added 4 weights: Medium, SemiBold, ExtraBold, and Black
- Added new features: 
    - Character Variants: cv08-cv15, cv19, cv20, cv41-cv48 
	- Required Contextual Alternates: rclt 
	- Required Ligatures: rlig 
	- Stylistic Sets: ss08-15, ss19, ss20
- Added UI name strings for Character Variants and Stylistic Sets features
- Added characters: 
    - U+2D33 TIFINAGH LETTER YAG
	- U+2D58 TIFINAGH LETTER AYER YAGH (Adrar yaj, Tuareg staggered five-points)
	- U+2D64 TIFINAGH LETTER TAWELLEMET YAZ (harpoon yaz)
- Added 8 variant characters and one right-to-left counterpart
- Added 9 bi-consonant ligatures, 21 ligature variants and 18 right-to-left counterparts
- Added glyphs for SIL vowels
- Fixed advance width of enspace, emspace, threeperemspace, fourperemspace and sixperemspace glyphs
- Removed Graphite support

15 Feb 2021 (SIL WSTech team) Akatab version 2.000
- Added Akatab Bold
- Changed design of all Latin glyphs to use Source Sans Pro
- Added characters to support "Recommended characters for Non-Roman fonts" at
  https://scriptsource.org/entry/gg5wm9hhd3

27 May 2020 (SIL WSTech team) Akatab version 1.000 (production release)
- Added TifLtrYo (U+2D67) and superscript vowel TifLtrYo.super (U+E304)
- Added a tilde-like character for use as a consonant length mark
- Fixed misoriented contours on some glyphs
- Other enhancements and bug fixes

20 December 2019  Akatab Beta2 version 0.910
- Added right to left glyphs
- Enhanced right to left behaviour
- Added raised (instead of slanted) characters for N and L 
- Added TifLtrYass (U+2D5A) and superscript vowels (U+E300 - U+E303)
- Other enhancements and, of course, bug fixes

31 March 2014  Akatab Beta version 0.900
- First version released under the SIL Open Font License


Information
-----------

The release of Akatab and Tirra under the OFL license provides a means for 
people to make their own modified version of Akatab or Tirra fonts (using a 
different name). For information on what you're allowed to change or modify, 
consult the OFL.txt and OFL-FAQ.txt files. 

Information for Contributors
----------------------------
We welcome contributions to this font project, such as new glyphs, enhanced
smart font code, or bug fixes. The best way to begin the process is to file an
issue in the Github project (https://github.com/silnrsi/font-akatab/issues)
or respond to an existing issue and express your interest. Then we can begin
to correspond with you regarding what all might be required and discuss how to
best submit your contributions.

To enable us to accept contributions in a way that honors your contribution
and respects your copyright while preserving long-term flexibility for open
source licensing, you would also need to agree to the SIL International
Contributor License Agreement (CLA) for Font Software (v1.0) prior to sending 
us your contribution. To read more about this requirement and find out how to
submit the required form, please visit the CLA information page
(https://software.sil.org/fontcla).


Acknowledgements
----------------
(Here is where contributors can be acknowledged. If you make modifications
be sure to add your name (N), email (E), web-address (W) and description
(D). This list is sorted by last name in alphabetical order.)

N: Paul D. Hunt
W: https://fonts.adobe.com/fonts/source-sans
D: Font design (Latin glyphs)

N: Andrew Savage
D: Research, design guidance, and user testing

N: SIL font designers and engineers
E: https://software.sil.org/about/contact/
W: https://software.sil.org/wstech/
D: Font design, Graphite, OpenType, and build support

The Akatab and Tirra fonts are maintained by SIL Global.
