# PTDF open-licensing scope Copyright © 2026 pasteToPrint contributors. This notice applies only to the exact PTDF files listed below. It does **not** change the license of the complete pasteToPrint application, hosted service, server implementation, account system, cloud features, brand assets, name or logo. ## CC BY 4.0 specification material The following human-readable documentation is licensed under [Creative Commons Attribution 4.0 International](LICENSES/CC-BY-4.0-PTDF.txt): - `PTDF-1.0.md` - `PTDF-COMPATIBILITY.md` - `DOCUMENT-SCHEMA-V1.md` - `TEMPLATE-CATALOG-V1.md` - `PTDF-REFERENCE-RENDERER.md` Attribution can use: > PTDF 1.0 — pasteToPrint Document Format, pasteToPrint contributors, > https://www.pastetoprint.com/PTDF-1.0.md, CC BY 4.0. Modified copies must indicate that changes were made. ## MIT machine-readable contracts and reference code The following files are licensed under the [MIT License](LICENSES/MIT-PTDF.txt): - `api/document-schema/v1/schema.json` - `api/document-schema/v1/capabilities.json` - `api/document-schema/v1/example.json` - `api/document-schema/v1/semantic-example.json` - `api/document-schema/v1/landscape-example.json` - `api/document-schema/v1/coloring-drawing-example.json` - `api/templates/v1/schema.json` - `api/templates/v1/catalog.json` - `api/v2/openapi.yaml` - `api/v1/public/sessions/openapi.yaml` - `tests/fixtures/ptdf-1.0-conformance.json` - `tests/fixtures/ptdf-1.0-contract-coverage.json` - `tests/fixtures/ptdf-1.0-historical.json` - `assets/js/document-schema.js` - `assets/js/document-templates.js` - `assets/js/qr.js` - `assets/css/ptdf.css` The JavaScript and CSS files above form the published PTDF 1.0 reference validator and renderer. Their documented entry point is `PasteToPrintDocumentSchema`. ## Excluded material Any file not explicitly listed above retains its existing status. In particular, the open licenses do not cover: - the hosted pasteToPrint service or its server-side implementation, - authentication, storage, cloud collaboration or commercial features, - application code outside the listed reference-renderer files, - trademarks, logos, domains or a right to claim official endorsement. An independent implementation may describe itself as compatible with PTDF 1.0, but must not present itself as the official pasteToPrint service.