Django-music-publisher

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This version was about making DMP compatible with both current
and future requirements within the precisely defined scope:
**single publisher**, **single manuscript share**.
(This scope has not changed since, nor will in the future.)

Most notably, support for multiple recordings per work and
CWR 3.0 (labeled as "experimental") were added. CWR preview, for
both versions, received basic syntax highlighting. Since this
version, CWR files are zipped.

20 Twenty
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Twenty-twenty was primarily about simplified deployment. Since
this version, DMP can be deployed to the Free Heroku dyno
(container) by non-techies.

.. note::
This free service was cancelled in late 2022. See "Rubicon" below.

Support for custom global share splits was added. MR/SR
affiliations for writers were also added. Syntax highlighting for
CWR acknowledgements was added, to simplify dealing with conflicts
and other registration-related issues.

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This version was focused on making DMP completely independent of
any software not available as open-source and compatible with the
MIT license.

CWR generation and complete data validation was added to the
open-source code. Full support for modified works was added, as
well as basic co-publishing support. Data export in JSON format
was added.

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Initial release in July 2018 had a very simple data structure.
It used external API for CWR generation. The code was open-source,
but it was dependant on a free tier of a commercial service.