This project is a fork of quill-delta (GitHub - slab/delta: Simple and expressive JSON format for describing rich-text content and their changes ), Copyright (c) 2022, Slab, Inc., licensed under the BSD 3-Clause License. 

Modifications and additions (nested-map attribute support and associated operational transform logic) are Copyright (c) 2026, RealtimeBoard, Inc. dba Miro, also licensed under the BSD 3-Clause License. See LICENSE.txt. "Slab" and "Quill" are trademarks/names of their respective owners and are not used here to imply endorsement of this fork.

The Python implementation (languages/python) additionally includes rich_text_delta/_fast_diff.py, a port of fast-diff (GitHub - jhchen/fast-diff), which modifies Diff Match and Patch, Copyright 2006 Google Inc., both licensed under the Apache License, Version 2.0. The TypeScript implementation depends on the same code as the fast-diff npm package rather than vendoring it. A copy of the Apache License, Version 2.0 is available at http://www.apache.org/licenses/LICENSE-2.0.