Apply CC BY 4.0 to codLLM contributions with citation and upstream notices

CITATION.cff

@@ -0,0 +1,29 @@
+cff-version: 1.2.0
+message: >-
+  Please credit Lucas E. B. Mortensen and Elias Dahl Lunøe when using
+  codLLM, and cite the thesis below in research publications. Also report
+  the model name and revision used. This is a citation request, not an
+  additional license condition.
+title: codLLM
+type: software
+authors:
+  - family-names: Mortensen
+    given-names: Lucas E. B.
+  - family-names: Lunøe
+    given-names: Elias Dahl
+repository-code: https://github.com/murrodroid/codllm
+url: https://huggingface.co/codllm
+preferred-citation:
+  type: thesis
+  authors:
+    - family-names: Mortensen
+      given-names: Lucas E. B.
+    - family-names: Lunøe
+      given-names: Elias Dahl
+  title: Automated Historical Cause-of-Death Coding Using Fine-Tuned Language Models
+  year: 2026
+  month: 6
+  institution:
+    name: Technical University of Denmark
+  thesis-type: Bachelor's thesis
+  url: https://huggingface.co/spaces/codllm/README/resolve/main/codLLM_Thesis.pdf

LICENSE

@@ -1,21 +1,396 @@
-MIT License
-
-Copyright (c) 2026 Elias Dahl Lunøe & Lucas E. Bülow Mortensen
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+

LICENSE-MIT-legacy

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Elias Dahl Lunøe & Lucas E. Bülow Mortensen
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

LICENSING.md

@@ -0,0 +1,68 @@
+# Licensing and citation
+
+codLLM permits commercial and non-commercial use, modification, and redistribution under standard licenses.
+The license depends on the material; these are not alternative licenses for the same material.
+
+| Material | License |
+|---|---|
+| Project software, scripts, tests, configuration, and code examples, including code in documentation | [Apache-2.0](./LICENSE-APACHE) |
+| Project-authored prose, documentation, figures, organization/model cards, and the authors' contributions to `codLLM_Thesis.pdf` | [CC BY 4.0](./LICENSE) |
+| codLLM model contributions released under this policy | [CC BY 4.0](./LICENSE), with upstream model terms and notices retained |
+| Third-party datasets, ICD10h masterlists/reference materials, dependencies, and attributed third-party content | Their respective terms; not relicensed by codLLM |
+
+Unless a file or release explicitly states otherwise, this scope applies to project-owned materials from this update
+onward. It does not grant rights that the authors do not hold. Third-party quotations, figures, and other attributed
+material in the thesis are excluded from the CC BY grant unless their own notices say otherwise. Raw archival datasets
+remain subject to their data-use agreements and are not distributed under either project license.
+
+The license texts are authoritative. [NOTICE](./NOTICE) records authorship and upstream attribution;
+[CITATION.cff](./CITATION.cff) provides the preferred citation.
+
+## Attribution and citation
+
+**Please credit Lucas E. B. Mortensen and Elias Dahl Lunøe when using codLLM, and cite the thesis in research publications.**
+Also identify the model name and revision used, so that results can be traced to a specific checkpoint.
+
+> Mortensen, Lucas E. B., and Elias Dahl Lunøe. 2026. *Automated Historical Cause-of-Death Coding Using Fine-Tuned
+> Language Models*. Bachelor's thesis, DTU Compute, Technical University of Denmark.
+
+[Read the thesis](https://huggingface.co/spaces/codllm/README/resolve/main/codLLM_Thesis.pdf).
+
+When publicly sharing CC BY material or adaptations, give appropriate credit, link to the material and license,
+retain supplied notices, and indicate changes as required by CC BY 4.0. For example:
+
+> Based on codLLM by Lucas E. B. Mortensen and Elias Dahl Lunøe (2026),
+> https://huggingface.co/codllm. Licensed under CC BY 4.0: https://creativecommons.org/licenses/by/4.0/.
+> Changes: [describe your changes, or state that none were made].
+
+For a model redistribution, link to the specific model and retain its upstream notices as well.
+For software redistribution, follow Apache-2.0's license, notice, attribution, and change-marking requirements.
+
+The research citation request is not an added license condition. These standard licenses do not impose a universal
+citation obligation merely for running the model, operating a service, or publishing outputs that do not themselves
+share licensed material. There are no additional non-commercial, field-of-use, or share-alike restrictions.
+
+## Model provenance and prior releases
+
+`codllm/codllm-base-deploy` is derived from Google's
+[FLAN-T5-base](https://huggingface.co/google/flan-t5-base), distributed under Apache-2.0.
+The CC BY declaration covers the codLLM contributions; it does not replace Google's license or attribution.
+Model releases must carry the applicable upstream license text and notices alongside the codLLM license and citation.
+
+Earlier software versions were released under MIT. The original notice is preserved in
+[LICENSES/MIT-legacy.txt](./LICENSE-MIT-legacy) and must be retained for incorporated MIT material.
+Earlier model revisions were released under Apache-2.0. This policy does not revoke permissions already granted:
+recipients can continue to use those earlier releases under their original terms, including where the same material
+is also offered under the new policy. No retroactive attribution or citation requirement is asserted.
+
+Future publication models must identify their actual upstream model, license scope, authors, and associated paper.
+Do not use a planned publication as if it were an existing citation.
+
+## Official license references
+
+- [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0)
+- [CC BY 4.0 legal code](https://creativecommons.org/licenses/by/4.0/legalcode.en)
+- [Creative Commons attribution guidance](https://creativecommons.org/faq/#do-i-always-have-to-attribute-the-creator-of-the-licensed-material)
+
+Creative Commons [recommends software-specific licenses for code](https://creativecommons.org/faq/#can-i-apply-a-creative-commons-license-to-software),
+which is why codLLM software uses Apache-2.0 and its other project-owned materials use CC BY 4.0.

NOTICE

@@ -0,0 +1,23 @@
+codLLM
+Copyright (c) 2026 Elias Dahl Lunøe & Lucas E. Bülow Mortensen
+
+Project: https://github.com/murrodroid/codllm
+Models: https://huggingface.co/codllm
+
+codLLM software is licensed under Apache-2.0. Project-authored prose,
+documentation, the bachelor's thesis, and codLLM model contributions are
+licensed under CC BY 4.0, as scoped in LICENSING.md. Third-party
+materials retain their own terms.
+
+The deployment model modifies Google's google/flan-t5-base through
+codLLM training. FLAN-T5-base is distributed under Apache-2.0:
+https://huggingface.co/google/flan-t5-base
+The upstream Apache license and applicable notices must be retained.
+
+Earlier codLLM software was distributed under MIT; its original notice
+is preserved in LICENSE-MIT-legacy. Earlier model revisions retain
+their original license grants. This update does not revoke those grants.
+
+Please credit Lucas E. B. Mortensen and Elias Dahl Lunøe and cite the
+thesis when using codLLM in research. CITATION.cff provides the preferred
+citation. This request does not add conditions to the standard licenses.

README.md

@@ -1,5 +1,5 @@
 ---
-license: apache-2.0
+license: cc-by-4.0
 library_name: transformers
 pipeline_tag: text-generation
 base_model: google/flan-t5-base
@@ -170,6 +170,10 @@ were not evaluated.
 
 ## Citation
 
+**Please credit Lucas E. B. Mortensen and Elias Dahl Lunøe when using this model, and cite the thesis in research publications.**
+Include the model name and revision used. [CITATION.cff](./CITATION.cff) provides machine-readable citation metadata.
+This citation request is not an additional license condition.
+
 Lucas E. B. Mortensen and Elias Dahl Lunøe (2026).
 *Automated Historical Cause-of-Death Coding Using Fine-Tuned Language Models.*
 Bachelor's thesis, DTU Compute, Technical University of Denmark. [Read the thesis][thesis].
@@ -191,15 +195,23 @@ Bachelor's thesis, DTU Compute, Technical University of Denmark. [Read the thesi
 
 </details>
 
-## License
+## License and attribution
+
+The codLLM model contributions and this model card are offered under **[CC BY 4.0](./LICENSE)**.
+Commercial and non-commercial use, modification, and redistribution are permitted under the applicable terms.
+When sharing licensed material or adaptations, credit **Lucas E. B. Mortensen and Elias Dahl Lunøe**, link to this
+model and the license, retain supplied notices, and indicate changes as required by CC BY 4.0.
 
-The [codLLM project source code][code] is licensed under the **MIT License**.
-An unchanged copy of the project's license, including the authors' copyright notice, is included as [LICENSE](./LICENSE).
+This checkpoint modifies Google's [FLAN-T5-base](https://huggingface.co/google/flan-t5-base) through codLLM training.
+The upstream **[Apache-2.0](./LICENSE-APACHE)** terms and notices remain applicable; the CC BY declaration does not
+replace them. These are licenses for different contributions, not a choice between two licenses for the whole model.
+The [project software][code] uses Apache-2.0.
 
-This checkpoint retains its existing **Apache-2.0** license declaration; see [LICENSE-APACHE](./LICENSE-APACHE).
-It modifies Google's [FLAN-T5-base](https://huggingface.co/google/flan-t5-base) weights through codLLM fine-tuning.
-The project-code license does not replace the checkpoint license or grant rights to third-party archival data or reference materials.
+See [NOTICE](./NOTICE) and [LICENSING.md](./LICENSING.md) for scope, attribution, and third-party exclusions.
+Raw archival data and ICD10h reference materials retain their own terms.
+Earlier model revisions remain available under their original Apache-2.0 terms; this update does not revoke prior grants.
+The standard licenses do not create a universal citation obligation merely for running the model or publishing outputs.
 
 [thesis]: https://huggingface.co/spaces/codllm/README/resolve/main/codLLM_Thesis.pdf
 [code]: https://github.com/murrodroid/codllm
-[languages]: https://github.com/murrodroid/codllm/blob/main/data/curation/source_languages.toml
+[languages]: https://github.com/murrodroid/codllm/blob/deploy/data/curation/source_languages.toml