halkyon/apps/learn/halkyon_learn_flutter/assets/makemeahanzi/ATTRIBUTION.md

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# Stroke data of Chinese characters
The stroke files in this folder derive from **Make Me a Hanzi**
(<https://github.com/skishore/makemeahanzi>), its data as of 2018-10-16
(commit `618dbab`), by Shaunak Kishore:
- the strokes from its `graphics.txt`, derived from the fonts Arphic PL KaitiM
GB and Arphic PL UKai, © 1999 Arphic Technology Co., Ltd., distributed under
the Arphic Public License (`ARPHICPL.TXT`, unaltered, as it asks);
- the components from its `dictionary.txt`, derived from the Unihan database
(© Unicode, Inc.) and CJKlib, distributed under the GNU Lesser General Public
License, version 3 or later (`LGPL.txt`, with Unicode's notice, as Make Me a
Hanzi ships it).
They are distributed under the same licences; the app's licence list shows
both. `halkyon_learn_curator`'s `curate makemeahanzi` writes them (see its
README), and each file says how and when it was changed (`notice`), as the
Arphic Public License asks: every stroke is the line Make Me a Hanzi draws
through its middle (its median), scaled into KanjiVG's 109 × 109 square with
its y axis pointing down, without the outlines; a character's components are
the first split of its decomposition (海: 氵, 每). They are an aggregate beside
the app, never part of its code nor copied into cards: a card names its
character, and the app draws it from these files.