--- layout: page title: Open [-Source-] Definition {+2.0+} --- [-#-] {+Version 2.0+} The Open [-Source-] Definition [-## Introduction-] [--] [-Open source doesn't just mean access to-] {+makes precise+} the [-source code. The distribution terms-] {+meaning of "open" with respect to knowledge, promoting a robust commons in which anyone may participate, and interoperability is maximized.+} {++} {+**Summary:** *Knowledge is open if anyone is free to access, use, modify, and share it — subject, at most, to measures that preserve provenance and openness.*+} {++} {+This essential meaning matches that+} of [-open-source-] {+"open" with respect to+} software [-must comply-] {+as in the [Open Source Definition](https://opensource.org/docs/osd) and is synonymous+} with {+"free" or "libre" as in+} the [-following criteria:-] [--] [-### 1.-] {+[Definition of+} Free [-Redistribution-] {+Cultural Works](http://freedomdefined.org).+} The [-license shall not restrict any party-] {+Open Definition was initially derived+} from [-selling or giving away-] the [-software as a component of an aggregate software distribution containing programs-] {+Open Source Definition, which in turn was derived+} from [-several different sources.-] {+the [Debian Free Software Guidelines](http://www.debian.org/social_contract).+} The [-license shall not require a royalty-] {+term **work** will be used to denote the item+} or [-other fee for such sale.-] [--] [-### 2. Source Code-] {+piece of knowledge being transferred.+} The [-program must include source code, and must allow distribution in source code as well as compiled form.-] {+term **license** refers to the legal conditions under which the work is+} {+made available.+} Where [-some form-] {+no license has been offered this should be interpreted+} {+as referring to default legal conditions governing use+} of [-a product is not distributed with source code, there-] {+the work (for +} {+example, copyright or public domain).+} {++} {+## 1. Open Works+} {++} {+An open **work**+} must {+satisfy the following requirements in its distribution:+} {++} {+### 1.1 Open License+} {++} {+The **work** *must*+} be {+available under an open **license** (as defined in Section 2).+} {+Any additional terms accompanying the work (such as+} a [-well-publicized means-] {+terms of use, or patents held by the licensor) *must not* +} {+contradict the terms+} of [-obtaining-] the [-source code for-] {+license.+} {++} {+### 1.2 Access+} {++} {+The **work** shall be available as a whole and at+} no more than a reasonable {+one-time+} reproduction [-cost preferably, downloading-] {+cost, preferably downloadable+} via the Internet without charge. {+Any additional information necessary for license compliance (such as names of +} {+contributors required for compliance with attribution requirements) *must* also +} {+accompany the work.+} {++} {+### 1.3 Open Format+} The [-source code must-] {+**work** *must*+} be [-the preferred form-] {+provided+} in [-which-] a [-programmer would modify the program. Deliberately obfuscated source code is not allowed. Intermediate forms-] {+convenient and modifiable form+} such [-as-] {+that there are no unnecessary technological obstacles to+} the [-output-] {+performance+} of {+the+} {+licensed rights. Specifically, data should be machine-readable, available in+} {+bulk, and provided in an open format (i.e., a format with+} a [-preprocessor-] {+freely available+} {+published specification which places no restrictions, monetary+} or [-translator are not allowed.-] {+otherwise, upon+} {+its use) or, at the very least, can be processed with at least one free/libre/open-source+} {+software tool.+} {++} {++} {+## 2. Open Licenses+} {++} {+A **license** is open if its terms satisfy the following conditions:+} ### [-3. Derived Works-] {+2.1 Required Permissions+} {++} {+The **license** *must* irrevocably permit (or allow) the following:+} {++} {+#### 2.1.1 Use+} The [-license must-] {+**license** *must*+} allow [-modifications and derived works,-] {+free use of the licensed work.+} {++} {+#### 2.1.2 Redistribution+} {++} {+The **license** *must* allow redistribution of the licensed work, +} {+including sale, whether on its own or as part of a collection made from +} {+works from different sources.+} {++} {+#### 2.1.3 Modification+} {++} {+The **license** *must* allow the creation of derivatives of the licensed +} {+work+} and [-must-] allow [-them to be distributed-] {+the distribution of such derivatives+} under the same terms [-as the license-] of the original [-software.-] [--] [-### 4. Integrity of The Author's Source Code-] {+licensed work.+} {++} {+#### 2.1.4 Separation+} The [-license may restrict source-code from being distributed in modified form *only* if-] {+**license** *must* allow any part of+} the [-license allows-] {+work+} {+to be freely used, distributed, or modified separately from any other part +} {+of+} the {+work or from any collection of works in which it was originally +} {+distributed. All parties who receive any+} distribution of [-"patch files" with the source code for the purpose-] {+any part+} of [-modifying-] {+a work within+} the [-program at build time. The license must explicitly permit distribution-] {+terms+} of [-software built from modified source code. The-] {+the original+} license [-may require derived works to carry a different name or version number from-] {+should have the same rights+} {+as those that are granted in conjunction with+} the original [-software.-] [--] [-### 5. No Discrimination Against Persons or Groups-] {+work.+} {++} {+#### 2.1.5 Compilation+} The [-license must not-] {+**license** *must* allow the licensed work to be distributed along +} {+with other distinct works without placing restrictions on these other works.+} {++} {+#### 2.1.6 Non-discrimination+} {++} {+The **license** *must not*+} discriminate against any person or [-group of persons.-] [--] [-### 6. No Discrimination Against Fields of Endeavor-] {+group.+} {++} {+#### 2.1.7 Propagation+} {++} {+The rights attached to the work *must* apply to all to whom it is redistributed +} {+without the need to agree to any additional legal terms.+} {++} {+#### 2.1.8 Application to Any Purpose+} {++} {+The **license** *must* allow use, redistribution, modification, and +} {+compilation for any purpose.+} The license [-must not-] {+*must not*+} restrict anyone from making use of the [-program-] {+work+} in a specific field of endeavor. [-For example, it may not restrict the program from being used in a business,-] {+#### 2.1.9 No Charge+} {++} {+The **license** *must not* impose any fee arrangement, royalty,+} or [-from being used for genetic research.-] [--] [-### 7. Distribution-] {+other+} {+compensation or monetary remuneration as part+} of [-License-] {+its conditions.+} {++} {+### 2.2 Acceptable Conditions+} The [-rights attached to the program must apply to all to whom-] {+**license** shall not limit, make uncertain, or otherwise diminish+} the [-program is redistributed without-] {+permissions +} {+required in Section 2.1 except by+} the [-need for execution-] {+following allowable conditions:+} {++} {+#### 2.2.1 Attribution+} {++} {+The **license** *may* require distributions+} of [-an additional license by those parties.-] [--] [-### 8. License Must Not Be Specific-] {+the work+} to [-a Product-] [--] [-The-] {+include attribution+} {+of contributors,+} rights [-attached to the program must-] {+holders, sponsors and creators as long as+} {+any such prescriptions are+} not [-depend on the program's being part-] {+onerous.+} {++} {+#### 2.2.2 Integrity+} {++} {+The **license** *may* require that modified versions+} of a [-particular software distribution. If the program is extracted from that distribution and used-] {+licensed work+} {+carry a different name+} or [-distributed within-] {+version number from+} the [-terms-] {+original work or +} {+otherwise indicate what changes have been made. +} {++} {+#### 2.2.3 Share-alike+} {++} {+The **license** *may* require copies or derivatives+} of [-the program's license, all parties-] {+a licensed work+} to [-whom the program is redistributed should have-] {+remain+} {+under a license+} the same [-rights-] as [-those that are granted in conjunction with-] {+or similar to+} the [-original software distribution.-] [--] [-### 9. License Must Not Restrict Other Software-] {+original.+} {++} {+#### 2.2.4 Notice+} The [-license must not place restrictions on other software that is distributed along with-] {+**license** *may* require retention of copyright notices and identification of+} the [-licensed software. For example,-] {+license.+} {++} {+#### 2.2.5 Source+} {++} {+The **license** *may* require modified works to be made available in a form preferred for further modification.+} {++} {+#### 2.2.6 Technical Restriction Prohibition+} {++} {+The **license** *may* prohibit distribution of+} the [-license must not insist that all other programs distributed-] {+work in a manner where technical measures impose restrictions+} on the [-same medium must be open-source software.-] [--] [-### 10. License Must Be Technology-Neutral-] [--] [-No provision-] {+exercise+} of {+otherwise allowed rights.+} {++} {+#### 2.2.7 Non-aggression+} {++} {+The **license** *may* require modifiers to grant+} the {+public additional permissions (for example, patent licenses) as required for exercise of the rights allowed by the license. The+} license may [-be predicated-] {+also condition permissions+} on {+not aggressing against licensees with respect to exercising+} any [-individual technology or style of interface.-] [--] [-*Last modified, 2007-03-22*-] [--] [-___-] [--] [-*Copy of <https://opensource.org/docs/osd> licensed under <http://creativecommons.org/licenses/by/4.0/>.*-] {+allowed right (again, for example, patent litigation).+}