# Data licence and attribution

The passage catalog in `catalog/` is a **derived database** of the Weimar Jazz
Database (WJazzD) v2.1, produced by the Jazzomat Research Project (HfM Weimar).
WJazzD is published under the
[Open Database License (ODbL) 1.0](https://opendatacommons.org/licenses/odbl/1-0/);
its individual contents are under the
[Database Contents License](https://opendatacommons.org/licenses/dbcl/1-0/).

**Attribution.** Contains information from WJazzD v2.1 (Pfleiderer, Frieler,
Abeßer, Zaddach & Burkhart, eds., *Inside the Jazzomat: New Perspectives for
Jazz Research*, 2017), available at
<https://jazzomat.hfm-weimar.de/download/download.html>.

**Jazz Trio Database.** The catalog also contains piano-trio solos derived from
the Jazz Trio Database (Cheston et al.,
<https://github.com/HuwCheston/Jazz-Trio-Database>), whose annotations are
released under the MIT licence. Piano MIDI is reduced to its top note per onset.

**Changes.** Solo transcriptions were re-indexed and aligned in pairs to find
shared phrases. The catalog stores each matched passage with its note positions,
alignment, similarity score, solo metadata, and recording links. Scores are
heuristics and are not part of the source data.

**Share-alike.** This derived catalog is made available under the ODbL 1.0. If
you redistribute it or a further adapted database, keep this notice and the same
licence. Visual material produced from it (the website) is a produced work and
must credit the source as above.

**Not covered by this licence.**
- Album covers come from the iTunes Search API and the Cover Art Archive and
  remain the property of their rights holders.
- Recording links point to third-party YouTube videos. JazzTube alignments are
  from <http://mir.audiolabs.uni-erlangen.de/jazztube/>.
- Artist portraits keep their own sources and terms.