Creative Commons Attribution 4.0 International License (CC BY 4.0)

Copyright (c) 2026 Atomira Technologies, S.L. and the Lemma cards
contributors.

This work is licensed under the Creative Commons Attribution 4.0
International License. You are free to:

  * Share — copy and redistribute the material in any medium or format
  * Adapt — remix, transform, and build upon the material for any
    purpose, even commercially

under the following terms:

  * Attribution — You must give appropriate credit, provide a link to
    the license, and indicate if changes were made. You may do so in
    any reasonable manner, but not in any way that suggests the licensor
    endorses you or your use.

  * No additional restrictions — You may not apply legal terms or
    technological measures that legally restrict others from doing
    anything the license permits.

The full legal text is available at:
https://creativecommons.org/licenses/by/4.0/legalcode

For a human-readable summary:
https://creativecommons.org/licenses/by/4.0/

How to attribute the Lemma cards corpus
---------------------------------------

When citing one or more cards from this corpus, include:

  * Author(s) of the specific card(s) (see the `references[]` and
    `contributors[]` fields in each card JSON)
  * The card id and version
  * A link to the source repository

Example:

  Lindhard Susceptibility card, version 0.1.0, Lemma cards corpus,
  Atomira Technologies, S.L., 2026.
  Available at https://github.com/artano-ai/lemma/cards/physics/
  condensed-matter/lindhard-susceptibility.json
