Kemonomimi is a context-free grammar in the likes of EBNF, and ABNF, but with additional constructs to make it more ergonomic for defining grammars.
The current version of the specification is located in the SPECIFICATION.md file. And will always be the most up-to-date version.
Kemonomimi and it's documentation and specification are licensed under the BSD-3-Clause, the full text of which can be found in the LICENSE file.