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| <div class="container"> <p>This page answers most of the common queries that we receive about our |
| licenses, and about licensing, packaging or redistributing our software. For |
| non-licensing questions, see our <a href="/foundation/preFAQ.html">General FAQ</a>.</p> |
| <h1 id="frequent-questions-about-apache-licensing">Frequent Questions about Apache Licensing<a class="headerlink" href="#frequent-questions-about-apache-licensing" title="Permalink">¶</a></h1> |
| <ol> |
| <li> |
| <p><a href="#License">Where can I find the Apache license?</a></p> |
| </li> |
| <li> |
| <p><a href="#Scope">Why are license files different for different Apache Software Foundation |
| projects?</a></p> |
| </li> |
| <li> |
| <p><a href="#Marks">Is 'Apache' a trademark?</a></p> |
| </li> |
| <li> |
| <p><a href="#IsItFree">Is software from The Apache Software Foundation free?</a></p> |
| </li> |
| <li> |
| <p><a href="#Export">What are the U.S. Export Classification Control Numbers (ECCNs) for |
| the various Apache software packages?</a></p> |
| </li> |
| <li> |
| <p><a href="#My-License">May I license my own software under the Apache license?</a></p> |
| </li> |
| <li> |
| <p><a href="#Apply-My-Software">How should I apply the Apache License to my own software?</a></p> |
| </li> |
| <li> |
| <p><a href="#CLA-Usage">May I re-use (and modify) the ASF Contributor License Agreements |
| (CLAs) for my own purposes?</a></p> |
| </li> |
| <li> |
| <p><a href="#mod-license">May I re-use (and modify) the Apache License 2.0 itself?</a></p> |
| </li> |
| <li> |
| <p><a href="#Distribute-changes">I've made improvements to Apache code; may I distribute |
| it?</a></p> |
| </li> |
| <li> |
| <p><a href="#Name-changes">May I call my modified code 'Apache'?</a></p> |
| </li> |
| <li> |
| <p><a href="#Must-Contribute">I have made changes to an Apache package and I want to distribute |
| it. Do I need to contribute the changes to the Apache Software |
| Foundation?</a></p> |
| </li> |
| <li> |
| <p><a href="#Translation">May I translate the Apache license into my local language for my |
| redistribution of Apache packages?</a></p> |
| </li> |
| <li> |
| <p><a href="#GPL">Is the Apache license compatible with the GPL (GNU Public |
| License)?</a></p> |
| </li> |
| <li> |
| <p><a href="#PatentScope">What is the scope of patent grants made to the ASF?</a></p> |
| </li> |
| <li> |
| <p><a href="#licenses">Can ASF PMCs host projects that are not under the Apache License?</a></p> |
| </li> |
| <li> |
| <p><a href="#cclas-not-required">Are contributors' employers required to sign a CCLA?</a></p> |
| </li> |
| <li> |
| <p><a href="#provenance">What is the provenance of source code from the ASF?</a></p> |
| </li> |
| </ol> |
| <p>If none of the above addresses your query, check the <a href="#resources">resources at |
| the bottom of this page</a> for further information.</p> |
| <h2 id="License">Where can I find the Apache license?<a class="headerlink" href="#License" title="Permalink">¶</a></h2> |
| <p>You can find the Apache License 2.0 (the current version) here: <a href="/licenses/LICENSE-2.0.txt">http://www.apache.org/licenses/LICENSE-2.0.txt</a></p> |
| <p>These are two older versions that we no longer use:</p> |
| <ul> |
| <li> |
| <p>Apache Software License 1.1: |
| <a href="/licenses/LICENSE-1.1.txt">http://www.apache.org/licenses/LICENSE-1.1.txt</a></p> |
| </li> |
| <li> |
| <p>Apache Software License 1.0: |
| <a href="/licenses/LICENSE-1.0.txt">http://www.apache.org/licenses/LICENSE-1.0.txt</a></p> |
| </li> |
| </ul> |
| <h2 id="Scope">Why are license files different for different Apache Software Foundation projects?<a class="headerlink" href="#Scope" title="Permalink">¶</a></h2> |
| <p>While the core Apache-developed code will be under one of the Apache |
| licenses, other third-party works may have been included and their license |
| text may have been added to the Apache project's LICENSE or NOTICE files. |
| Alternatively, they may be available separately.</p> |
| <h2 id="Marks">Is 'Apache' a trademark?<a class="headerlink" href="#Marks" title="Permalink">¶</a></h2> |
| <p>'Apache', 'Apache Software Foundation', the multicoloured feather, and the |
| various Apache project names and logos are either registered trademarks or trademarks of The Apache |
| Software Foundation in the United States and other countries. |
| See our <a href="marks/">Trademark Policy</a> for details of how to use Apache project trademarks, and our helpful <a href="marks/resources">site map of trademark resources</a>.</p> |
| <h2 id="IsItFree">Is software from The Apache Software Foundation free of charge?<a class="headerlink" href="#IsItFree" title="Permalink">¶</a></h2> |
| <p>Yes. <strong>All</strong> software developed by <strong>all</strong> projects of The Apache Software |
| Foundation is freely available without charge from the Foundation's web |
| sites. This is specified in the Foundation's <a href="records/incorporator.html">Articles of |
| Incorporation</a> and <a href="/free/">explained in |
| more detail</a> why our software is always free (no charge).</p> |
| <p>This is regardless of the use of the software. We do not distinguish between personal, internal, or |
| commercial use of our software, and we do not charge for any of these uses. A reminder, however, that the terms |
| of <a href="#License">our license</a> always apply.</p> |
| <h2 id="Export">What are the U.S. Export Classification Control Numbers (ECCNs) for the various Apache software packages?<a class="headerlink" href="#Export" title="Permalink">¶</a></h2> |
| <p>See the <a href="/licenses/exports/">ASF Exports Classifications and Source |
| Links</a> page.</p> |
| <h2 id="My-License">May I license my own software under the Apache license?<a class="headerlink" href="#My-License" title="Permalink">¶</a></h2> |
| <p>Certainly. Version 2.0 of the license was designed to be reusable, and many parties other than the ASF use it.</p> |
| <h2 id="Apply-My-Software">How should I apply the Apache License to my own software?<a class="headerlink" href="#Apply-My-Software" title="Permalink">¶</a></h2> |
| <p>Include a copy of the Apache License, typically in a file called LICENSE, in your work, and consider also including a NOTICE file.</p> |
| <p>It is also valuable to tag each of your source-code files in case they become detached from the LICENSE file. To apply the Apache License to your source-code files, one approach is to attach the following notice to as a comment at the top of each file. Replace the copyright templates with your own identifying information:</p> |
| <pre><code>Copyright [yyyy] [name of copyright owner] |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| https://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| </code></pre> |
| <p>A shorter variant you may wish to use is:</p> |
| <pre><code>Copyright [yyyy] [name of copyright owner] |
| SPDX-License-Identifier: Apache-2.0 |
| </code></pre> |
| <p>Note that the Apache Software Foundation uses a different source header that is related to our use of a CLA. Our instructions for our project's source headers are <a href="/legal/src-headers.html#headers">here</a>.</p> |
| <h2 id="CLA-Usage">May I re-use (and modify) the ASF Contributor License Agreements (CLAs) for my own purposes?<a class="headerlink" href="#CLA-Usage" title="Permalink">¶</a></h2> |
| <p>Yes, you can re-use and modify them; You just can't hold the ASF |
| legally responsible if these documents are not exactly what you intend them |
| to be. We recommend that you obtain your own legal advice so you know |
| exactly what you are getting yourself into.</p> |
| <p>If you adapt these agreements for your own purposes, make |
| sure that the phrase 'Apache Software Foundation' and any confusingly |
| similar references or parts that specifically refer to the Apache |
| organisation do not appear in your version of the agreements (except to |
| note that your version is derived and differs from the original provided by |
| the ASF).</p> |
| <h2 id="mod-license">May I re-use (and modify) the Apache License 2.0 itself?<a class="headerlink" href="#mod-license" title="Permalink">¶</a></h2> |
| <p>You may re-use our license unchanged, and also modify it.</p> |
| <p>If you modify it, you are on your own from a legal point of view, and the result |
| is NOT the Apache License, just a new license inspired by ours.</p> |
| <p>This means that the terms 'Apache License', 'Apache', and any similar references |
| to the ASF cannot appear in your modified license, other than to state that it differs |
| from the original.</p> |
| <p>Also, you cannot use 'Apache' in the name of the modified license. |
| Names like "Apache License with such-and-such clause", for example, are not acceptable, |
| as they cause confusion.</p> |
| <p>Creating a new license is a non-trivial task. If you do that we recommend that you get your own legal advice.</p> |
| <h2 id="Distribute-changes">I've made improvements to the Apache code; may I distribute the modified result?<a class="headerlink" href="#Distribute-changes" title="Permalink">¶</a></h2> |
| <p>Absolutely -- subject to the <a href="/licenses/LICENSE-2.0#redistribution">terms of the Apache license</a>, |
| of course. You can give your modified code away for free, sell it, keep it to |
| yourself, or whatever you like. Just remember that the original code is |
| still covered by the Apache license and you must comply with its terms. |
| Even if you change every single line of the Apache code you're using, the |
| result is still based on the Foundation's licensed code. You may distribute |
| the result under a different license, but you need to acknowledge the use |
| of the Foundation's software. To do otherwise would be stealing.</p> |
| <p>If you think others would find your changes useful, though, we <em>do</em> |
| encourage you to submit them to the appropriate Apache project for possible |
| inclusion.</p> |
| <h2 id="Name-changes">May I call my modified code 'Apache'?<a class="headerlink" href="#Name-changes" title="Permalink">¶</a></h2> |
| <p><strong>No</strong>. You may, however, use phrasing such as 'based on |
| Apache', 'powered by Apache', or 'based on Apache technology'. You <strong>must |
| not</strong> use the Foundation's marks in any way that states or implies, or can |
| be interpreted as stating or implying, that the Apache Software Foundation endorses or created the final product. For example, it would be |
| acceptable to use a name like 'SuperWonderServer powered by Apache', but |
| never a name like 'Apache SuperWonderServer'. This is similar to the |
| distinction between a product named 'Microsoft Burp' and 'Burp for |
| Microsoft Windows'.</p> |
| <p>You may similarly identify the specific Foundation project whose code |
| you're using, such as with 'based on Apache Xerces' or 'powered by Apache |
| Tomcat technology'.</p> |
| <p>If you wish to use a name including any of the Foundation's marks, such as |
| the word 'Apache', ask our permission first. See our |
| <a href="foundation/marks/">Trademark Policy</a> for more details.</p> |
| <h2 id="Must-Contribute">I have made changes to an Apache package and I want to distribute them. Do I need to contribute them to the Apache Software Foundation?<a class="headerlink" href="#Must-Contribute" title="Permalink">¶</a></h2> |
| <p>No. You can keep your changes a secret if you like. But please seriously consider contributing your changes to the project from which your got the original code. We all benefit when you do.</p> |
| <h2 id="Translation">May I translate the Apache license into my local language for my redistribution of Apache packages?<a class="headerlink" href="#Translation" title="Permalink">¶</a></h2> |
| <p>Yes, you may translate the license text into your local language. |
| <strong>However</strong> , any such translated text is only for the convenience of |
| understanding, and is <em>not</em> legally binding. Only the English-language |
| version of the license, <em>which you must continue to include in your |
| packaging</em> , is authoritative and applicable in case legal interpretation |
| is required.</p> |
| <h2 id="GPL">Is the Apache license compatible with the GPL (GNU Public License)?<a class="headerlink" href="#GPL" title="Permalink">¶</a></h2> |
| <p>From the <a href="http://www.fsf.org/licensing/licenses/#SoftwareLicenses">Free Software |
| Foundation</a> |
| website:</p> |
| <blockquote> |
| <p><span class="link-external"> <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version |
| 2.0</a> </span></p> |
| </blockquote> |
| <p>This is a free software license, compatible with version 3 of the GPL. |
| Please note that this license is not compatible with GPL version 2, because |
| it has some requirements that are not in that older version. These include |
| certain patent termination and indemnification provisions.</p> |
| <h2 id="PatentScope">What is the scope of patent grants made to the ASF?<a class="headerlink" href="#PatentScope" title="Permalink">¶</a></h2> |
| <style> |
| dl dt {float: left} |
| dl dd {margin-left: 3em} |
| </style> |
| <p>This is a four part question:</p> |
| <dl> |
| <dt>Q1:</dt> |
| <dd>If I own a patent and contribute to a Work, and, at the time my |
| contribution is included in that Work, none of my patent's claims are |
| subject to Apache's Grant of Patent License, is there a way any of |
| those claims would later become subject to the Grant of Patent License |
| solely due to subsequent contributions by other parties who are not |
| licensees of that patent?</dd> |
| <dt>A1:</dt> |
| <dd>No.</dd> |
| <dt>Q2:</dt> |
| <dd>If at any time after my contribution, I am able to license other |
| patent claims that would have been subject to Apache's Grant of Patent |
| License if they were licenseable by me at the time of my contribution, |
| do those other claims become subject to the Grant of Patent License?</dd> |
| <dt>A2:</dt> |
| <dd>Yes.</dd> |
| <dt>Q3:</dt> |
| <dd>If I own or control a licensable patent and contribute code to a |
| specific Apache product, which of my patent claims are subject to |
| Apache's Grant of Patent License?</dd> |
| <dt>A3:</dt> |
| <dd>The only patent claims that are licensed to the ASF are those you own |
| or have the right to license that read on your contribution or on the |
| combination of your contribution with the specific Apache product to |
| which you contributed as it existed at the time of your contribution. |
| No additional patent claims become licensed as a result of subsequent |
| combinations of your contribution with any other software. Note, |
| however, that licensable patent claims include those that you acquire |
| in the future, as long as they read on your original contribution as |
| made at the original time. Once a patent claim is subject to Apache's |
| Grant of Patent License, it is licensed under the terms of that Grant |
| to the ASF and to recipients of any software distributed by the ASF |
| for any Apache software product whatsoever.</dd> |
| <dt>Q4:</dt> |
| <dd>What is an Apache product?</dd> |
| <dt>A4:</dt> |
| <dd>An Apache product is a body of software being developed by the ASF |
| that the ASF intends to both alter and to publish as a separate line |
| of releases.</dd> |
| </dl> |
| <h2 id="licenses">Can ASF PMCs host projects that are not under the Apache License?<a class="headerlink" href="#licenses" title="Permalink">¶</a></h2> |
| <p>No. If you are an ASF PMC with a truly exceptional situation, please create a JIRA issue about it.</p> |
| <h2 id="cclas-not-required">Are contributors' employers required to sign a CCLA?<a class="headerlink" href="#cclas-not-required" title="Permalink">¶</a></h2> |
| <p>Only if their employment situation necessitates that a CCLA be signed. |
| See section 4 of the ICLA for details.</p> |
| <p>Committers must sign an ICLA. They make an individual claim that the code that |
| they contribute is theirs to license. Reviewing their ICLA against their |
| employer's ownership interests, applicable state and national law, and specific |
| aspects of their employment contract and business policies will reveal that |
| they can or cannot make that claim regarding any particular commit to whichever |
| particular project they are committing in.</p> |
| <p>The CCLA is a backup document that the committer/ICLA signer may use to |
| eliminate ambiguity between all these conflicting laws, contracts, |
| policies and job assignments. We've never required it; many committers |
| are confident of their individual representations under the ICLA, many other |
| committers find it reassuring that their company has backed up their own |
| ICLA with this umbrella document.</p> |
| <p>It is the ICLA signatory's call if it is required, but it isn't exactly an easy |
| call for many committers employed in the IT/Software industry.</p> |
| <p>Finally, see section 8 of the ICLA, which requires signers to notify the |
| Foundation when their status changes in ways that may require their ICLA to |
| be reassessed.</p> |
| <h1 id="provenance">What is the provenance of source code from the ASF?<a class="headerlink" href="#provenance" title="Permalink">¶</a></h1> |
| <p>Source code (including machine-readable documentation, release notes, guides, |
| test cases, run books, and scripts) in Apache repositories falls into three |
| classifications (solely for the purpose of this discussion):</p> |
| <h4 id="code-developed-at-apache-under-apache-governance-licensed-to-apache-by-its-developers-under-a-contributor-license-agreement-distributed-by-apache-and-licensed-to-downstream-users-under-the-apache-license">Code developed at Apache under Apache governance, licensed to Apache by its developers under a Contributor License Agreement, distributed by Apache, and licensed to downstream users under the Apache license<a class="headerlink" href="#code-developed-at-apache-under-apache-governance-licensed-to-apache-by-its-developers-under-a-contributor-license-agreement-distributed-by-apache-and-licensed-to-downstream-users-under-the-apache-license" title="Permalink">¶</a></h4> |
| <p>This represents most code at Apache. The code contains a standard Apache license |
| header which refers to the standard Apache license in the distribution.</p> |
| <h4 id="code-developed-elsewhere-licensed-to-apache-under-a-software-grant-agreement-incorporated-into-apache-projects-distributed-by-apache-and-licensed-to-downstream-users-under-the-apache-license">Code developed elsewhere, licensed to Apache under a Software Grant Agreement, incorporated into Apache projects, distributed by Apache, and licensed to downstream users under the Apache license<a class="headerlink" href="#code-developed-elsewhere-licensed-to-apache-under-a-software-grant-agreement-incorporated-into-apache-projects-distributed-by-apache-and-licensed-to-downstream-users-under-the-apache-license" title="Permalink">¶</a></h4> |
| <p>This is code that is brought into Apache for future development as part |
| of an Apache project. The headers on all files are changed to the standard Apache |
| header. Most incubator projects start with a repository of externally-developed code and the |
| Intellectual Property Clearance process is done as part of incubation.</p> |
| <p>Code that is originally developed elsewhere and is brought into Apache for |
| future development as part of an existing project must have the Intellectual Property |
| Clearance process done explicitly by the PMC of the receiving project, under the |
| auspices of the Incubator PMC, which must approve the process.</p> |
| <h4 id="code-developed-elsewhere-received-under-a-category-a-license-incorporated-into-apache-projects-distributed-by-apache-and-licensed-to-downstream-users-under-its-original-license">Code developed elsewhere, received under a Category A license, incorporated into Apache projects, distributed by Apache, and licensed to downstream users under its original license<a class="headerlink" href="#code-developed-elsewhere-received-under-a-category-a-license-incorporated-into-apache-projects-distributed-by-apache-and-licensed-to-downstream-users-under-its-original-license" title="Permalink">¶</a></h4> |
| <p>This code retains its external identity and is incorporated into an Apache project |
| for convenience, to avoid referencing an external repository whose contents are not |
| under control of the project. The code retains its original license, and distribution as |
| part of the Apache project explicitly calls out the license. The code retains its original |
| headerm, which refers to its own license in the distribution. If changes are made to the |
| code while at Apache, the standard Apache header is prepended to each changed |
| file. Additionally, any legally-required notices related to the code are published in the |
| distribution.</p> |
| <h1 id="resources">Another place to Look<a class="headerlink" href="#resources" title="Permalink">¶</a></h1> |
| <p>If you have questions about The Apache Software Foundation, its projects, |
| or its software, we recommend the following link for more information or |
| assistance:</p> |
| <ul> |
| <li>The Foundation pre-FAQ: <a href="/foundation/preFAQ.html">Contact Apache |
| FAQ</a></li> |
| </ul> |
| <p>If you have a question specifically about the Apache license or |
| distribution of Apache software, and it has not been answered by this page, |
| <a href="/legal/">contact the Legal Affairs Committee</a>.</p> |
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