License
Overview
This project uses a deliberate dual-license structure to distinguish software implementation from derived research assets:
- Code: MIT License (LICENSE)
- Data / Figures / Authored Documentation: Creative Commons Attribution 4.0 International (DATA_LICENSE.md)
- Branding: Reserved (no automatic license grant)
See the consolidated summary in NOTICE. When in doubt, open an issue for clarification before redistribution.
Code (MIT)
All source code (Python scripts, build tooling, JavaScript modules, CSS, configuration) is provided under the MIT License. You may reuse, modify, and redistribute provided you preserve the original copyright and license text.
Data & Documentation (CC BY 4.0)
Processed JSON / CSV outputs, derived analytical products (e.g., resampled series, alignment summaries), and generated figures (PNG/SVG) are licensed under CC BY 4.0. Provide attribution including project name, index names, and a link to the repository or archival DOI (once minted).
Suggested attribution (short form):“Includes processed paleomagnetic intensity structure indices (Charlie / Charlie Prime) from The Reliford Principle (MIT code; data CC BY 4.0).”
Full guidance and dataset source notes: DATA_LICENSE.md.
Badge: CC BY 4.0
Scope Clarification
- In scope (CC BY): Generated JSON in
data/latest/, processed / resampled outputs, analytical figures infigures/, prose indocs/&content/. - Not covered: Original upstream paleomagnetic datasets (cite their primary publications).
Branding Assets
Logos, wordmarks, and any distinctive visual identifiers in assets/branding/ are reserved. You may display them unmodified solely to reference this project. Do not create derivative logos or imply endorsement without permission.
Naming & Attribution Policy
Preserve canonical names: The Reliford Principle (TRP), Charlie, Charlie Prime. See NAMING_AND_ATTRIBUTION.md for rationale and recommended narrative attribution.
Citation
Use the structured metadata in CITATION.cff (Git hosting platforms surface a “Cite this repository” button). Until a formal release or DOI is issued, cite the commit hash you used plus access date. Example:
The Reliford Principle (Charlie & Charlie Prime indices). Commit <short-sha>, accessed YYYY-MM-DD.Third-Party Components
- Plotly.js (MIT): interactive chart rendering
- axe-core (MPL 2.0): accessibility testing (dev only)
- Other transitive dependencies retain their original licenses (see their bundled notices if any).
FAQ
Can I bundle the code and processed JSON in my own site?
Yes. Keep MIT license text with the code and attribute the processed data under CC BY 4.0. Retain canonical naming.
Can I recompile figures into a publication?
Yes, with CC BY attribution and citation of this repository (plus upstream datasets if directly referenced).
Can I modify the logo?
No. Branding is reserved; request permission for derivative marks.
Questions
Open an issue for licensing clarifications or to request additional usage permissions. Ambiguous cases are usually resolved by mapping assets to one of the three scope categories above.