Licence for the denckring catalogue
===================================

This licence covers the catalogue data only:

    src/denckring/data/catalogue.yaml

and anything exported from it, including the output of

    denckring catalogue export

It does NOT cover the source code in this repository, which is licensed under the
Apache License 2.0 — see LICENSE and NOTICE.


Creative Commons Attribution 4.0 International (CC BY 4.0)
----------------------------------------------------------

Human-readable summary:  https://creativecommons.org/licenses/by/4.0/
Legal code:              https://creativecommons.org/licenses/by/4.0/legalcode

You are free to share and adapt this data for any purpose, including commercially,
provided you give appropriate credit, link to the licence, and indicate whether
changes were made.


Attribution
-----------

Attribution satisfying the BY term:

    denckring catalogue, https://github.com/senzelden/denckring, CC BY 4.0

When redistributing a modified version, say so, so that readers do not attribute
your changes to this project.


A note on the sources within the data
-------------------------------------

Each entry carries a `source` field and an `attribution` field recording how that
source was established:

    primary      a named author, work and year this catalogue stands behind
    reference    attested in a standard reference work rather than traced to an
                 origin — most often the Oulipo Compendium, Borgmann's Language on
                 Vacation, or Word Ways
    traditional  classical or folk, with no single origin to name

The distinction matters for reuse. A `primary` row asserts an origin; a `reference`
row asserts only that the form is documented somewhere reputable. Do not silently
promote the second into the first.

The works cited in `source` fields are themselves under their own copyright, which
this licence does not affect. What is licensed here is the catalogue — the
selection, description and arrangement — not the works it points at.
