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2026

Entessa Public License v1.0

Also known as Entessa, Entessa Public License 1.0, Entessa Public License v1.0.

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/Entessa

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.
    • Notice from the text Notice: keeping the license and copyright notices with every copy.
    • Rename from the text Giving a modified or derived work a name that tells it apart from the original.
  • 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

    • Add statement from the text The text says: "“This product includes open source software developed by openSEAL (http://www.openseal.org/).”" Attaching terms, notices or statements of one's own to the work or to one's modifications when passing it on.
    • 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.
    • Notice from the text Notice: keeping the license and copyright notices with every copy.
    • Rename from the text Giving a modified or derived work a name that tells it apart from the original.
  • 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 names “openSEAL” and “Entessa” must not be used to endorse or promote products derived from this software without prior written permission." 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 ``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 ENTESSA, LLC, OPENSEAL 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

The names "openSEAL" and "Entessa" must not be used to endorse or promote products derived from this software without prior written permission. For written permission, please contact epl@entessa.com. Products derived from this software may not be called "openSEAL", nor may "openSEAL" appear in their name, without prior written permission of Entessa. This software consists of voluntary contributions made by many individuals on behalf of openSEAL and was originally based on software contributed by Entessa, LLC, http://www.entessa.com. For more information on the openSEAL, please see <http://www.openseal.org/>.

Promotion specification

The end-user documentation included with the redistribution, if any, must include the following acknowledgment: "This product includes open source software developed by openSEAL (http://www.openseal.org/)." Alternately, this acknowledgment may appear in the software itself, if and wherever such third-party acknowledgments normally appear.

Info

Target asset types
Software
Region / jurisdiction
Worldwide
Validity
Perpetual
Source
https://spdx.org/licenses/Entessa.html
Legal code
https://opensource.org/license/Entessa
This description is published under
Creative Commons Attribution 4.0 International
Publisher
Entessa, LLC
Attribution name
Entessa, LLC
SPDX identifier
Entessa on the SPDX license list
DALICC identifier
Entessa

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/Entessa",
  "license-title": "Entessa Public License v1.0",
  "spdx-id": "Entessa",
  "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/Entessa> .

RDF, JSON-LD 

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

HTML attribution 

<p>This work is licensed under <a href="https://dalicc.net/licenselibrary/Entessa" rel="license">Entessa Public License v1.0</a>.</p>

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

Badge DALICC badge for Entessa Public License v1.0

Markdown 

[![License: Entessa Public License v1.0](https://dalicc.net/license-library/Entessa/badge.svg)](https://dalicc.net/license-library/Entessa)

HTML 

<a href="https://dalicc.net/license-library/Entessa"><img src="https://dalicc.net/license-library/Entessa/badge.svg" alt="License: Entessa Public License v1.0"></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
10 recorded, 7 applied to the record, 0 proposed

The Entessa Public License is the Apache License 1.1 with the names changed: the two BSD redistribution conditions, the prescribed acknowledgment in the end-user documentation, the no-endorsement clause and the bar on calling a derived product openSEAL. The record follows BSD-3-Clause for its duties and PHP-3.01 for the acknowledgment. Nothing here is legal advice.

10 findings

  • info Rubric 2 odrl:target applied

    dcmitype:Software alone, following BSD-3-Clause, whose text this licence follows sentence for sentence. The licence speaks of software in source and binary forms and of nothing else.

  • 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". That is the library's permissive base set: reproduce, distribute, modify, derive, display, present, commercial use, derivative works, modified works and the distribution fee. No patent licence is granted and none is refused, so nothing patent-related is written.

  • major Rubric 4 odrl:prohibition applied

    Condition 4 says "The names "openSEAL" and "Entessa" must not be used to endorse or promote products derived from this software without prior written permission", which is dalicc:promote. dalicc:ChangeLicense is prohibited because conditions 1 and 2 require this list of conditions to travel with every copy, the reading BSD-3-Clause and IscLicense carry. (Corrected on 2026-09-15 by the verification pass: see the rubric 3 finding on relicensing below.)

  • major Rubric 5 odrl:duty applied

    Conditions 1 and 2 give cc:Attribution and cc:Notice on the three acts. Condition 3 requires the acknowledgment "This product includes open source software developed by openSEAL (http://www.openseal.org/)." in the end-user documentation, which is dalicc:addStatement on odrl:distribute with the text in dalicc:PromotionSpecification, the pattern PHP-3.01 uses. Condition 5, "Products derived from this software may not be called "openSEAL"", is dalicc:rename on odrl:modify and odrl:derive.

  • minor Rubric 6 dalicc:additionalClauses applied

    The disclaimer paragraph is split at "IN NO EVENT SHALL" into dalicc:WarrantyDisclaimer and dalicc:LiabilityLimitation, the split the BSD records of review group 3 use. dalicc:additionalClauses carries conditions 4 and 5 and the closing paragraph about the origin of the software.

  • info Rubric 7 cc:jurisdiction applied

    The text names no governing law and no term, so cc:jurisdiction is dalicc:worldwide and dalicc:validityType is dalicc:perpetual.

  • info Rubric 8 vocabulary none

    No gap: every clause of this licence has a term. The prescribed acknowledgment is the only clause that needed a second field, dalicc:PromotionSpecification, which already exists.

  • info Rubric 9 record none

    The consistency check of app.services.composer with the axioms of dg_default returned an empty list for this record.

  • info Rubric 10 family none

    Entessa and Naumen are the two Apache 1.1 derivatives of this review group. Entessa keeps the advertising acknowledgment and the product-naming bar; Naumen drops both and adds a modification notice instead. Neither has anything to do with the Common Public License, although the review group groups them with it.

  • 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 of 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.

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    4 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:distribute with duties [cc:Attribution, cc:Notice, dalicc:addStatement]

      was permission odrl:distribute with duties [cc:Attribution, cc:Notice, dalicc:addStatement]

      Manual edit Its duty dalicc:addStatement quotes "“This product includes open source software developed by openSEAL (http://www.openseal.org/).”"

    • changed prohibition dalicc:promote

      was prohibition dalicc:promote

      Manual edit The statement now quotes the sentence of the licence text it rests on: "The names “openSEAL” and “Entessa” must not be used to endorse or promote products derived from this software without prior written permission."

    • 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 (Eclipse, Common Public and Lucent).

    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.