DATA SOURCES, LICENSES AND ATTRIBUTION
=====================================

This file describes the data behind this site: where it comes from, which
licence applies to which part, and what to write if you reuse it.

The site's code, interface, brand and original teaching content are not open
source. The licences below apply to the data files they name.


1. WHAT IS UNDER WHICH LICENCE
------------------------------

HSK word lists (word, pinyin, level)
  Source:  complete-hsk-vocabulary by Yanis Zafirópulos
           https://github.com/drkameleon/complete-hsk-vocabulary
           plus the official HSK 3.0 (2021) and HSK 2.0 (2009) lists
  Licence: MIT (see MIT-complete-hsk-vocabulary.txt)
  Changes: normalised to simplified Chinese; levels mapped to the two HSK
           standards; part-of-speech tags normalised.

English definitions
  Source:  CC-CEDICT
           https://www.mdbg.net/chinese/dictionary?page=cc-cedict
  Licence: CC BY-SA 4.0 (see CC-BY-SA-4.0.txt)
  Changes: converted from the CC-CEDICT line format; senses joined with "; ";
           pinyin and part-of-speech tags normalised.
  Translations of these definitions into other languages are adaptations and
  are released under the same licence.

Hanzi data (stroke counts, radicals, readings)
  Source:  Unicode Character Database (Unihan)
           https://www.unicode.org/charts/unihan.html
  Licence: Unicode License V3 (see UNICODE-LICENSE-V3.txt)

Stroke-order graphics
  Source:  Make Me a Hanzi
           https://github.com/skishore/makemeahanzi
  Licence: Arphic Public License (see ARPHIC-PUBLIC-LICENSE.txt)
  Changes: stroke paths extracted from graphics.txt and served as SVG.

Example sentences
  Source:  Tatoeba
           https://tatoeba.org
  Licence: CC BY 2.0 FR (see CC-BY-2.0-FR.txt)
  Changes: sentences selected for HSK level and length; some sentence-final
           punctuation normalised; pinyin and audio added.
  Attribution: Tatoeba's FAQ accepts a single site-wide credit:
           "Example sentences from Tatoeba (CC BY 2.0 FR), contributed by
           their community." with a link to https://tatoeba.org.

Audio
  Generated for this site with Alibaba Cloud NLS text-to-speech (voice:
  aiqi). No third-party audio recordings are redistributed.

Fonts
  Inter (og-image rendering) and, for Japanese/Korean/Thai editions, Noto
  fonts. Licence: SIL Open Font License 1.1 (see OFL-1.1.txt).

Everything else
  Graded readings, grammar cards, interface text, illustrations, the logo and
  the code are copyright their authors, all rights reserved.


2. COPY-PASTE ATTRIBUTION
-------------------------

If you reuse the downloadable word lists:

  Word lists derived from complete-hsk-vocabulary (MIT) and the official HSK
  standards. Definitions adapted from CC-CEDICT (CC BY-SA 4.0).

If you reuse only the definitions in a way covered by CC BY-SA 4.0:

  Definitions adapted from CC-CEDICT (https://www.mdbg.net/chinese/dictionary?page=cc-cedict),
  licensed CC BY-SA 4.0. Changes: converted from the CC-CEDICT line format;
  senses joined with "; ".

If you reuse example sentences:

  Example sentences from Tatoeba (https://tatoeba.org), contributed by their
  community, licensed CC BY 2.0 FR.

If you reuse the stroke-order graphics:

  Stroke graphics from Make Me a Hanzi (https://github.com/skishore/makemeahanzi),
  licensed under the Arphic Public License. The full licence text is included
  in ARPHIC-PUBLIC-LICENSE.txt.


3. FULL LICENCE TEXTS
---------------------

  CC-BY-SA-4.0.txt                 Creative Commons Attribution-ShareAlike 4.0
  CC-BY-2.0-FR.txt                 Creative Commons Attribution 2.0 France
  MIT-complete-hsk-vocabulary.txt  MIT License (complete-hsk-vocabulary)
  ARPHIC-PUBLIC-LICENSE.txt        Arphic Public License
  UNICODE-LICENSE-V3.txt           Unicode License V3
  OFL-1.1.txt                      SIL Open Font License 1.1

The licence texts are kept in their authoritative language (English, and
French for CC BY 2.0 FR). Do not treat a translation as the licence.


4. QUESTIONS AND CORRECTIONS
----------------------------

If you find a mistake in a definition, a level, or a licence statement, email
the address on the contact page. Corrections are folded into the next build.

This notice is descriptive, not legal advice.