DICTIONARY DATA NOTICE

This database adapts lexicon and language-model data from the open-gram project associated with SunPinyin. ShuangPin does not embed the SunPinyin engine.

Lexicon: open-gram contributors; includes Android Pinyin IME and other contributions.
https://github.com/sunpinyin/open-gram/blob/master/data/dict.full

Language-model statistics: extracted from open-gram's lm_sc.t3g.arpa-20121025. Historical SunPinyin packaging metadata credits the model to Kefu Chai <tchaikov@gmail.com>.
https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/open-gram/lm_sc.t3g.arpa-20121025.tar.bz2

The archived open-gram project description explicitly states that its collected Chinese lexicon and n-gram statistics are available under the Apache License, Version 2.0. The project license is recorded as Apache-2.0, and the model download specifies no different file-specific terms.
https://code.google.com/archive/p/open-gram/
https://www.apache.org/licenses/LICENSE-2.0

ShuangPin changes include removing model metadata and unknown/punctuation records, extracting and integer-scaling unigram probabilities, converting QuanPin readings to Xiaohe ShuangPin, and converting the data to SQLite/SQLCipher format.

The host app's Open-source acknowledgements contain the complete Apache-2.0 license text. No upstream endorsement is implied.