Provenance & third-party licensing
The micro-topics, the prerequisite graph, and all of Marble’s authored text are original work, released under ODbL 1.0 + CC BY-SA 4.0 (see README).
data/curriculum-standards.json is different. Those standards are extracted from external curriculum frameworks that Marble does not own and cannot relicense. You can only receive from us the rights the upstream holders grant. Each source’s terms — and exactly what we ship — are below.
The “codes-only” distinction
For encumbered sources we ship only the standard code (e.g. 1-ESS1-1) and its key — a short factual identifier, low copyright risk — and we omit the verbatim standard text (description, clarificationStatement, etc.). The topic→standard links in topics.json are unaffected, so “this topic maps to standard X” is preserved throughout. Sources marked textIncluded: false in curriculum-standards.json are codes-only.
Per-source terms
🟢 uk-nc-2013 — The National Curriculum in England (KS1–2) — full text
- Publisher / rights: UK Department for Education. © Crown copyright.
- License: Open Government Licence v3.0. Permits commercial use, adaptation, and redistribution. No share-alike.
- Required notice: “Contains public sector information licensed under the Open Government Licence v3.0.”
- We ship: full standard text.
🟡 ccss-ela, ccss-math — Common Core State Standards — full text
- Publisher / rights: © 2010 National Governors Association Center for Best Practices (NGA Center) and Council of Chief State School Officers (CCSSO).
- License: the CCSS Public License grants “a limited, non-exclusive, royalty-free license to copy, publish, distribute, and display the Common Core State Standards for purposes that support the Common Core State Standards Initiative.” This is purpose-limited, and it does not clearly grant derivative-work or sublicensing rights — so the CCSS-derived records remain under the CCSS Public License, not ODbL.
- Required notice: “© Copyright 2010 National Governors Association Center for Best Practices and Council of Chief State School Officers.”
- We ship: full standard text, under the CCSS Public License.
🔴 ngss-k5, ngss-ms — Next Generation Science Standards — codes only
- Publisher / rights: copyright held by the National Academies Press. “NGSS” and “Next Generation Science Standards” are registered trademarks of WestEd.
- License: non-commercial entities may freely copy/adapt. Commercial entities may use the standards only with restrictions — including submitting samples for approval and a mandatory trademark disclaimer. Not relicensable under ODbL.
- Required notice (if referencing NGSS): “NGSS is a registered trademark of WestEd. Neither WestEd nor the lead states and partners that developed the Next Generation Science Standards were involved in the production of this product, and do not endorse it.”
- We ship: codes/keys only (verbatim text omitted). To include full NGSS text, obtain WestEd clearance first.
🔴 c3-social-studies — C3 Framework for Social Studies — codes only
- Publisher / rights: © National Council for the Social Studies (NCSS).
- License: permission-based; redistribution of the framework text requires NCSS permission.
- We ship: codes/keys only. Obtain NCSS permission before shipping full text.
🔴 ib-pyp-pspe — IB PYP Personal, Social & Physical Education Scope & Sequence — codes only
- Publisher / rights: © International Baccalaureate Organization (IBO).
- License: IB content is copyrighted and IBO is protective of it; redistribution requires explicit IB permission. This is the most restrictive source.
- We ship: codes/keys only. Do not ship full text without IB permission.
Changing what ships
The export tool takes a per-source switch. To (re)include a source’s full text after clearing rights, regenerate with that slug removed from the codes-only set:
# ship everything verbatim
DATABASE_URL=… node exportTaxonomy.mjs --codes-only=
# default (encumbered sources codes-only)
DATABASE_URL=… node exportTaxonomy.mjs