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2026

Common Public Attribution License Version 1.0

Also known as CPAL 1.0, CPAL-1.0.

Commercial use
allowed
Share alike
not required
Attribution
required (keep the copyright and license notices)
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Write this as a license text (needs an account) DALICC reads the model above and writes what it permits, requires and prohibits in plain English. Without an account, the Text download above writes the model out from the vocabulary.

Canonical URI https://dalicc.net/licenselibrary/CommonPublicAttributionLicenseVersion10

Permissions

  • Add limitation from the text Adding further limitations or restrictions to the license terms when passing the work on.
  • Charge distribution fee from the text Charging a fee for the act of providing a copy of the work to someone else.
  • Commercial use from the text Using the work to generate income, directly or indirectly, for example by selling it or by using it in advertising.
  • Derivative works from the text Distributing an adaptation of the work and making it available to the public.
  • Derive from the text Creating a new work from the work, such as a translation, adaptation or arrangement of it or of a part of it.

    Duties

    • Attribution from the text Giving credit to the copyright holders or authors of the work, in the form the licensor asks for.
    • Modification notice from the text Marking a changed work as changed, saying how it differs from the original and keeping earlier notices of change.
    • Notice from the text Notice: keeping the license and copyright notices with every copy.
    • Source code from the text Providing access to the source code of the work with every copy distributed.
  • Display from the text Showing the work to the public without making a copy the viewer keeps.
  • Distribute from the text Providing copies of the work to the public or to anyone else.

    Duties

    • Attribution from the text Giving credit to the copyright holders or authors of the work, in the form the licensor asks for.
    • Notice from the text Notice: keeping the license and copyright notices with every copy.
    • Source code from the text Providing access to the source code of the work with every copy distributed.
  • Grant use from the text Granting third parties the right to use the work.
  • Modify from the text Altering the work, for example by updating it, without creating a new work; an alteration that creates a new work is Derive.

    Duties

    • Modification notice from the text Marking a changed work as changed, saying how it differs from the original and keeping earlier notices of change.
    • Source code from the text Providing access to the source code of the work with every copy distributed.
  • No-warranty notice from the text Attaching a notice that the work is provided without any warranty.
  • Present from the text Performing the work in public, including by broadcast or other communication to the public.
  • Reproduce from the text Making copies of the work in any form.

Prohibitions

  • Add statement from the text Not permitted: Add statement. Attaching terms, notices or statements of one's own to the work or to one's modifications when passing it on.
  • Promote from the text Not permitted: Promote. Using the name or trademarks of the licensor or of contributors to endorse or promote a product.

License-wide duties

This license states no duties that apply to the work as a whole.

What applies by default

The statements above are the library's reading of this license: each is marked with the sentence it rests on, or as a library convention where the text is not explicit. The statements below are the ones the DALICC reasoner supplies for acts the license says nothing about, from the default rules of the dependency graph it reasons with. Each one names the legal source it rests on. None of it is in the record.

No default rule of that graph reaches this license: it speaks about every act the rules are about.

Clauses

Warranty disclaimer

COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN “AS IS” BASIS, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT THE INITIAL DEVELOPER, ORIGINAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER THIS DISCLAIMER.

Limitation of liability

UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY, WHETHER TORT (INCLUDING NEGLIGENCE), CONTRACT, OR OTHERWISE, SHALL YOU, THE INITIAL DEVELOPER, ORIGINAL DEVELOPER, ANY OTHER CONTRIBUTOR, OR ANY DISTRIBUTOR OF COVERED CODE, OR ANY SUPPLIER OF ANY OF SUCH PARTIES, BE LIABLE TO ANY PERSON FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OF ANY CHARACTER INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF GOODWILL, WORK STOPPAGE, COMPUTER FAILURE OR MALFUNCTION, OR ANY AND ALL OTHER COMMERCIAL DAMAGES OR LOSSES, EVEN IF SUCH PARTY SHALL HAVE BEEN INFORMED OF THE POSSIBILITY OF SUCH DAMAGES. THIS LIMITATION OF LIABILITY SHALL NOT APPLY TO LIABILITY FOR DEATH OR PERSONAL INJURY RESULTING FROM SUCH PARTY’S NEGLIGENCE TO THE EXTENT APPLICABLE LAW PROHIBITS SUCH LIMITATION. SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THIS EXCLUSION AND LIMITATION MAY NOT APPLY TO YOU.

Info

Target asset types
Software
Region / jurisdiction
Worldwide
Validity
Perpetual
Source
http://opensource.org/licenses/CPAL-1.0
Legal code
http://opensource.org/licenses/CPAL-1.0
This description is published under
Creative Commons Attribution 4.0 International
Publisher
Socialtext Incorporated
SPDX identifier
CPAL-1.0 on the SPDX license list
DALICC identifier
CommonPublicAttributionLicenseVersion10

This record is published under CC BY 4.0. Credit it as: DALICC License Library, DALICC - Verein zur Förderung der Rechtssicherheit in der Datenbewirtschaftung, https://dalicc.net, CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). The license it describes belongs to its publisher.

Use this license

Everything below is generated from this record. Replace the example address with the address of your own work.

JSON sidecar 

{
  "license-uri": "https://dalicc.net/licenselibrary/CommonPublicAttributionLicenseVersion10",
  "license-title": "Common Public Attribution License Version 1.0",
  "spdx-id": "CPAL-1.0",
  "attribution": "Copyright (c) [year] [copyright holder]",
  "asset": null,
  "generated-by": "DALICC"
}

RDF, Turtle 

@prefix cc: <http://creativecommons.org/ns#> .

<https://example.org/my-work>
    cc:license <https://dalicc.net/licenselibrary/CommonPublicAttributionLicenseVersion10> .

RDF, JSON-LD 

{
  "@context": {
    "cc": "http://creativecommons.org/ns#"
  },
  "@id": "https://example.org/my-work",
  "cc:license": {
    "@id": "https://dalicc.net/licenselibrary/CommonPublicAttributionLicenseVersion10"
  }
}

HTML attribution 

<p>This work is licensed under <a href="https://dalicc.net/licenselibrary/CommonPublicAttributionLicenseVersion10" rel="license">Common Public Attribution License Version 1.0</a>.</p>

This license asks for attribution, so the credit line is part of it.

Badge DALICC badge for Common Public Attribution License Version 1.0

Markdown 

[![License: Common Public Attribution License Version 1.0](https://dalicc.net/license-library/CommonPublicAttributionLicenseVersion10/badge.svg)](https://dalicc.net/license-library/CommonPublicAttributionLicenseVersion10)

HTML 

<a href="https://dalicc.net/license-library/CommonPublicAttributionLicenseVersion10"><img src="https://dalicc.net/license-library/CommonPublicAttributionLicenseVersion10/badge.svg" alt="License: Common Public Attribution License Version 1.0"></a>

Review

Status
Reviewed against the license text
Last checked
2026-09-15
Reviewer
Giray Havur
Verdict
corrected during the review
Record changed since this review
yes (version 2, 2026-09-24)
Findings
6 recorded, 4 applied to the record, 1 proposed

The Common Public Attribution License is the Mozilla Public License 1.1 with two additions: a required attribution notice (Exhibit B) and a network-use trigger. The record was the worst in the review group: it prohibited derivative works, which the license grants, prohibited share-alike, which the license requires, and repeated three permission statements. All of that was corrected. It had no dct:source and no SPDX id.

6 findings

  • minor Rubric 5 odrl:permission applied

    Three permission statements were present twice: odrl:display, odrl:distribute with its three duties, and odrl:modify with its two. Removed the duplicates, as flagged in the family conventions checked before the review.

  • major Rubric 3 odrl:prohibition applied

    Sections 2.1(b) and 2.2(b) grant the right "to use, reproduce, modify, display, perform, sublicense and distribute the Original Code (or portions thereof) with or without Modifications". The record prohibited both odrl:derive and cc:DerivativeWorks, so the compatibility checker treated every adaptation as forbidden. Removed both prohibitions and added the permissions with the duties the license does impose.

  • major Rubric 5 odrl:prohibition applied

    Section 3.1 requires Covered Code to be distributed "only under the terms of this License". The record prohibited cc:ShareAlike, the reverse. Removed.

  • minor Rubric 1 spdx:licenseId applied

    Added CPAL-1.0 and the missing dct:source.

  • major Rubric 5 odrl:duty proposed

    The positive half of the share-alike finding: a license-wide cc:ShareAlike duty. Held back because the record permits odrl:grantUse, which sections 2.1(b) and 2.2(b) do grant, and the dependency graph treats the two as contradictory.

  • gap Rubric 8 vocabulary none

    Two clauses that define this license have no term. Exhibit B requires every user-visible screen to display an attribution logo and phrase of a set size for a set period, which cc:Attribution cannot express (proposed: dalicc:runtimeAttributionDisplay). Section 1.4 defines "Deploy" to include use "to provide services ... or otherwise" over a network, which triggers the source obligation (proposed: dalicc:networkUseTrigger). The patent grant and patent termination of sections 2 and 8.2 are further gaps.

Report an issue The review record as JSON The review checks the model against the license text. It is not legal advice.

History

This license model has 2 versions. Version 2 is the one served today; every earlier version keeps its own address, so a conclusion drawn from one of them can still be checked against it.

  1. Version 2 current2026-09-24 Giray Havur

    The content review of 2026-09-15 added 2 identification details and 2 permissions, removed 3 prohibitions and recorded the review state. Later changes named the license the record itself is published under.

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    10 changes

    • added dalicc:reviewStatus dalicc:Reviewed

      Review state Every record records how far it has come in the editorial workflow and when it was last checked against the legal text.

    • added dalicc:reviewedOn "2026-09-15"^^xsd:date

      Review state Every record records how far it has come in the editorial workflow and when it was last checked against the legal text.

    • added dct:source osl:CPAL-1.0

      Review finding Added CPAL-1.0 and the missing dct:source.

    • added permission cc:DerivativeWorks

      Review finding Sections 2.1(b) and 2.2(b) grant the right "to use, reproduce, modify, display, perform, sublicense and distribute the Original Code (or portions thereof) with or without Modifications". The record prohibited both odrl:derive and cc:DerivativeWorks, so the compatibility checker treated every adaptation as forbidden. Removed both prohibitions and added the permissions with the duties the license does impose.

    • added permission odrl:derive with duties [cc:Attribution, cc:Notice, cc:SourceCode, dalicc:modificationNotice]

      Review finding Sections 2.1(b) and 2.2(b) grant the right "to use, reproduce, modify, display, perform, sublicense and distribute the Original Code (or portions thereof) with or without Modifications". The record prohibited both odrl:derive and cc:DerivativeWorks, so the compatibility checker treated every adaptation as forbidden. Removed both prohibitions and added the permissions with the duties the license does impose.

    • removed prohibition cc:DerivativeWorks

      Review finding Sections 2.1(b) and 2.2(b) grant the right "to use, reproduce, modify, display, perform, sublicense and distribute the Original Code (or portions thereof) with or without Modifications". The record prohibited both odrl:derive and cc:DerivativeWorks, so the compatibility checker treated every adaptation as forbidden. Removed both prohibitions and added the permissions with the duties the license does impose.

    • removed prohibition cc:ShareAlike

      Review finding Section 3.1 requires Covered Code to be distributed "only under the terms of this License". The record prohibited cc:ShareAlike, the reverse. Removed.

    • removed prohibition odrl:derive

      Review finding Sections 2.1(b) and 2.2(b) grant the right "to use, reproduce, modify, display, perform, sublicense and distribute the Original Code (or portions thereof) with or without Modifications". The record prohibited both odrl:derive and cc:DerivativeWorks, so the compatibility checker treated every adaptation as forbidden. Removed both prohibitions and added the permissions with the duties the license does impose.

    • added spdx:licenseId "CPAL-1.0"

      Review finding Added CPAL-1.0 and the missing dct:source.

    • added dct:license <https://creativecommons.org/licenses/by/4.0/>

      Manual edit Every record is published under CC BY 4.0. cc:license names the record DALICC keeps of that licence; dct:license now names it by the address Creative Commons publishes it at, so that a consumer matching the canonical IRI finds it.

  2. Version 1

    The version this model had before the content review of 2026-09-15.

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Every change names the reason behind it: a finding of the content review, one of its library-wide decisions, the metadata that review wrote onto every record, or a hand edit. None of it is legal advice.

Nothing on this page is legal advice. What a license means is decided by its text; ask a legal advisor before you rely on it.