DEVELOPMENT VERSION: This is an experimental DALICC environment. Features, data and APIs may change or be reset without notice. A stable version of this service, with a potentially different feature set, will be made available soon at dalicc.net.

2026

Zope Public License 2.0

Also known as ZPL-2.0, Zope Public License (ZPL) 2.0, Zope Public License 2.0.

Commercial use
allowed
Share alike
not required
Attribution
required (keep the copyright and license notices)
Compare with… Add to the compatibility check Download JSON-LD Turtle RDF/XML Text

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/ZPL-2.0

Permissions

  • Change license by library convention Library convention: family rule 15: Permissive records permit relicensing. Replacing the license of the work, or of an adaptation, with another license, or changing its terms.

    Duties

    • Use a compliant license by library convention Library convention: family rule 15: Permissive records permit relicensing. Choosing a replacement license that stays compliant with the terms of the original license.
  • 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 The text says: "If any files are modified, you must cause the modified files to carry prominent notices stating that you changed the files and the date of any change." 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.
  • 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.
  • Modified works from the text Distributing a modified version of the work that does not amount to a new, derivative 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

    • 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 The text says: "If any files are modified, you must cause the modified files to carry prominent notices stating that you changed the files and the date of any change." 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.
  • 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

  • Promote from the text Not permitted: Promote. The text says: "The name Zope Corporation (tm) must not be used to endorse or promote products derived from this software without prior written permission from Zope Corporation." 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

THIS SOFTWARE IS PROVIDED BY ZOPE CORPORATION ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

Limitation of liability

IN NO EVENT SHALL ZOPE CORPORATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Additional clauses

4. The right to distribute this software or to use it for any purpose does not give you the right to use Servicemarks (sm) or Trademarks (tm) of Zope Corporation. Use of them is covered in a separate agreement (see http://www.zope.com/Marks).

Info

Target asset types
Software
Region / jurisdiction
Worldwide
Validity
Perpetual
Source
https://spdx.org/licenses/ZPL-2.0.html
Legal code
http://old.zope.org/Resources/License/ZPL-2.0
This description is published under
Creative Commons Attribution 4.0 International
Publisher
Zope Corporation
Attribution name
Zope Corporation
SPDX identifier
ZPL-2.0 on the SPDX license list
DALICC identifier
ZPL-2.0

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/ZPL-2.0",
  "license-title": "Zope Public License 2.0",
  "spdx-id": "ZPL-2.0",
  "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/ZPL-2.0> .

RDF, JSON-LD 

{
  "@context": {
    "cc": "http://creativecommons.org/ns#"
  },
  "@id": "https://example.org/my-work",
  "cc:license": {
    "@id": "https://dalicc.net/licenselibrary/ZPL-2.0"
  }
}

HTML attribution 

<p>This work is licensed under <a href="https://dalicc.net/licenselibrary/ZPL-2.0" rel="license">Zope Public License 2.0</a>.</p>

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

Badge DALICC badge for Zope Public License 2.0

Markdown 

[![License: Zope Public License 2.0](https://dalicc.net/license-library/ZPL-2.0/badge.svg)](https://dalicc.net/license-library/ZPL-2.0)

HTML 

<a href="https://dalicc.net/license-library/ZPL-2.0"><img src="https://dalicc.net/license-library/ZPL-2.0/badge.svg" alt="License: Zope Public License 2.0"></a>

Review

Written from the license text by
Giray Havur
Written on
2026-09-15
Second review
not yet done
Record changed since this review
yes (version 2, 2026-09-24)
Findings
8 recorded, 7 applied to the record, 0 proposed

Models version 2.0 of the Zope Public License, a three-clause BSD licence with a separate trademark clause and a change-notice clause. The record follows BSD-3-Clause and adds dalicc:modificationNotice. Nothing here is legal advice.

8 findings

  • major Rubric 3 odrl:permission applied

    The grant reads "Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met", so the record carries the BSD permission set.

  • major Rubric 4 odrl:prohibition applied

    Clause 3 states "The name Zope Corporation (tm) must not be used to endorse or promote products derived from this software without prior written permission from Zope Corporation", modelled as a dalicc:promote prohibition. dalicc:ChangeLicense is prohibited as on the BSD records. (Corrected on 2026-09-15 by the verification of this review group: see the rubric 3 finding on relicensing below.)

  • major Rubric 5 odrl:duty applied

    Clauses 1 and 2 give cc:Attribution and cc:Notice on odrl:distribute, odrl:modify and odrl:derive. Clause 5, "If any files are modified, you must cause the modified files to carry prominent notices stating that you changed the files and the date of any change", gives dalicc:modificationNotice on odrl:modify and odrl:derive. This is what separates the Zope licence from plain BSD-3-Clause.

  • minor Rubric 6 dalicc:additionalClauses applied

    Clause 4, which says the right to distribute or use the software "does not give you the right to use Servicemarks (sm) or Trademarks (tm) of Zope Corporation" and points at a separate agreement, is quoted verbatim. The warranty and liability sentences are split into their own predicates.

  • info Rubric 7 cc:jurisdiction applied

    The text names no legal system and sets no term, so cc:jurisdiction is dalicc:worldwide and dalicc:validityType is dalicc:perpetual.

  • info Rubric 9 record none

    The consistency check of app.services.composer with the dependency graph dg_default returned an empty conflict list.

  • major Rubric 10 record applied

    The review group notes expected ZPL 2.0 to carry a condition that derived works be renamed and ZPL 2.1 to drop it. The SPDX text of 2.0 carries no such condition: its five conditions are source retention, binary retention, endorsement, trademarks and change notices. No dalicc:rename duty is written for either Zope record.

  • major Rubric 3 odrl:permission applied

    Library convention 15: a licence that asks for no reciprocity and no source code asks only that the notice travels with the copy, which is a duty on the acts it governs and not a bar on putting the copy under other terms. dalicc:ChangeLicense is therefore a permission here, and the prohibition the earlier reading wrote is removed. The text reads: "Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions in source code must retain the above copyright notice, this list of conditions, and the following disclaimer." The permission carries the dalicc:compliantLicense duty, as Apache-2.0 does, because the notice has to survive the relicensing.

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 changes since version 1 recorded which sentence of the text each statement rests on and named the license the record itself is published under.

    View JSON-LD Turtle RDF/XML

    5 changes

    • changed permission dalicc:ChangeLicense with duties [dalicc:compliantLicense]

      was permission dalicc:ChangeLicense with duties [dalicc:compliantLicense]

      Manual edit The statement is marked as a library convention, family rule 15: Permissive records permit relicensing: the text does not state it in as many words. Its duty dalicc:compliantLicense is marked as a library convention, family rule 15: Permissive records permit relicensing.

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

      was permission odrl:derive with duties [cc:Attribution, cc:Notice, dalicc:modificationNotice]

      Manual edit Its duty dalicc:modificationNotice quotes "If any files are modified, you must cause the modified files to carry prominent notices stating that you changed the files and the date of any change."

    • changed permission odrl:modify with duties [cc:Attribution, cc:Notice, dalicc:modificationNotice]

      was permission odrl:modify with duties [cc:Attribution, cc:Notice, dalicc:modificationNotice]

      Manual edit Its duty dalicc:modificationNotice quotes "If any files are modified, you must cause the modified files to carry prominent notices stating that you changed the files and the date of any change."

    • changed prohibition dalicc:promote

      was prohibition dalicc:promote

      Manual edit The statement now quotes the sentence of the licence text it rests on: "The name Zope Corporation (tm) must not be used to endorse or promote products derived from this software without prior written permission from Zope Corporation."

    • 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

    Created from the license text on 2026-09-15 (Python, PHP, Unicode and W3C).

    View JSON-LD Turtle RDF/XML

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.