# NOTICE — third-party data licenses and attribution

`data/rhymes.min.json` is a derived work generated by `tools/build-rhyme-data.mjs`.
This file carries the notices its sources require. Keep it alongside the data.

## 1. CMU Pronouncing Dictionary — BSD-2-Clause

Pronunciations are derived from the CMU Pronouncing Dictionary
(https://github.com/cmusphinx/cmudict). Its license deems the dictionary
contents source code, so redistribution of derived data must retain the
following notice, reproduced verbatim and in full:

```
Copyright (C) 1993-2015 Carnegie Mellon University. All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
   The contents of this file are deemed to be source code.

2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in
   the documentation and/or other materials provided with the
   distribution.

This work was supported in part by funding from the Defense Advanced
Research Projects Agency, the Office of Naval Research and the National
Science Foundation of the United States of America, and by member
companies of the Carnegie Mellon Sphinx Speech Consortium. We acknowledge
the contributions of many volunteers to the expansion and improvement of
this dictionary.

THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
```

## 2. Word-frequency ranks — Creative Commons Attribution 3.0 Unported (CC BY 3.0)

Frequency rank data is derived from the **Google Books Ngram Viewer datasets**
(https://books.google.com/ngrams), whose official datasets page states:
"This compilation is licensed under a Creative Commons Attribution 3.0
Unported License."

The ranks were obtained via the pre-computed list `frequency-alpha-alldicts.txt`
from **gwordlist** by hackerb9 (https://github.com/hackerb9/gwordlist), whose
README states: "I'm explicitly releasing the data produced under the same
license as Google granted me: Creative Commons Attribution 3.0." Only that data
file is used; none of the gwordlist scripts (GPL >= 3) are used or included.

**Attribution:** "Contains frequency data derived from the Google Books Ngram
Viewer datasets (https://books.google.com/ngrams), CC BY 3.0, via gwordlist
(https://github.com/hackerb9/gwordlist)."

The derived rank information inside `data/rhymes.min.json` is accordingly
available under **CC BY 3.0**; the CMU-derived pronunciation grouping carries
the BSD-2-Clause notice above.