Software Licensing: A Minefield Guide - Andrey Listochkin

The document discusses how to properly license open source software to avoid legal issues. It recommends: 1) picking the right license for your project; 2) including attribution, license notices, and the full text of the license in your source code; and 3) using a contributor license agreement to assign copyrights of contributions to the project owner. Failure to follow proper licensing can result in losing control of your code, patents, trade secrets or even your company to legal issues. The presentation provides tips and examples of how to properly implement licensing.

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This document summarizes a study of license violations in the npm and RubyGems package dependency networks. The researchers analyzed over 750,000 npm packages and 95,000 RubyGems packages to determine: 1) the most prevalent licenses in each ecosystem, 2) the extent that direct dependencies rely on incompatible licenses, and 3) how license incompatibility spreads across indirect dependencies. They found that MIT and Apache licenses are most common, direct dependencies rarely have incompatible licenses, and GPL dependencies cause most indirect violations that decrease with deeper dependency levels.

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This presentation discusses viral licensing and the fears surrounding them, specifically the GNU GPL. It analyzes whether these fears are valid under the European legal framework and recent case law. It explores exceptions for interoperability that could clarify when linking software does or does not extend licensing. While the GPL assumes linking creates derivatives, the presentation notes a lack of case law supporting this. It argues exceptions for interoperability and prejudice of legitimate interests may allow linking GPL and other share-alike licensed software without violating licenses.

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OSSA17 - Mixed License FOSS Projects

Many projects start out with the intention of staying single license FOSS projects. As your project grows, reality hits: some components or files may need to use different licenses than originally anticipated. There are many reasons why this can happen: you may need to interface with projects of another license, you may want to import code from other projects or your developers may not understand the subtleties of the licenses in use. Besides the obvious challenges of managing mixed license FOSS projects, such as license compatibility and tracking what licenses you use, you are running the risk of exposing your project to unintended consequences. This talk will explore unintended consequences, risks and best practices using some examples from the recent history of the Xen Project. In particular we will cover: Refactoring can lead to licensing changes: best practices and unintended consequences when importing code from elsewhere. Making code archeology easy from a licensing perspective and why it is important. A worked example of a license change of a key component: process, pain points, their causes and how they could have been avoided The perils of LGPL/GPL vX (or Later): the unintended consequences of not providing pre-defined copyright headers in your source base We will conclude with a summary of lessons and best practices from both the Xen Project and a quick overview of how usage of SPDX and other tools may help you.

ePractice workshop on Open Source Software, 7 April 2011 - Philippe Laurent

ePractice.eu

Compatibility of free and open source software (FLOSS) licenses refers to whether code distributed under different licenses can be combined. Strict compatibility is one-way, as GPL code cannot be added to BSD code, though BSD code can be added to GPL. Copyleft licenses like GPL have predominant effect, making other licenses incompatible. Newer licenses like GPLv3 and EUPL include clauses to improve compatibility, such as allowing additional permissions or defining compatible licenses. Compatibility issues must be considered before and during development to allow code reuse and acceptability.

Open Source—Avoiding Common Pitfalls

KRLaw

More than ever, open source software is at the heart of modern online businesses and technology companies. Open source is nearly everywhere: web browsers, smartphones, home wireless routers, databases, web servers, and countless components of free, commercial, and large enterprise software. But most open source software comes with strings attached, and if misunderstood, they can trip up the unwary. Recently Ansel Halliburton held a webinar to discuss the common pitfalls in open source licensing, and the best practices for avoiding them.

Open Source Software - Avoiding Common Pitfalls

More than ever, open source software is at the heart of modern online businesses and technology companies. Open source is nearly everywhere: web browsers, smartphones, home wireless routers, databases, web servers, and countless components of free, commercial, and large enterprise software. But most open source software comes with strings attached, and if misunderstood, they can trip up the unwary. Topics: • The most common sources of non-compliance with open source licenses • The key differences between the most popular licenses • The basis in intellectual property law for open source licensing • How courts in the US and abroad have enforced open source licenses These slides are from a webinar by attorney Ansel Halliburton on September 22, 2015.

Fosdem17 - Mixed License FOSS Projects

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Many projects start out with the intention of staying single license FOSS projects. As your project grows, reality hits: some components or files may need to use different licenses than originally anticipated. There are many reasons why this can happen: you may need to interface with projects of another license, you may want to import code from other projects or your developers may not understand the subtleties of the licenses in use. Besides the obvious challenges of managing mixed license FOSS projects, such as license compatibility and tracking what licenses you use, you are running the risk of exposing your project to unintended consequences. This talk will explore unintended consequences, risks and best practices using some examples from the recent history of the Xen Project. In particular we will cover: 1. Refactoring can lead to licensing changes: best practices and unintended consequences when importing code from elsewhere. Making code archeology easy from a licensing perspective and why it is important. 2. A worked example of a license change of a key component: process, pain points, their causes and how they could have been avoided 3. The perils of LGPL/GPL vX (or Later): the unintended consequences of not providing pre-defined copyright headers in your source base We will conclude with a summary of lessons and best practices.

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ORTC Library - Introduction

Erik Lagerway

Object RTC (ORTC) is a free, open project that enables mobile endpoints to talk to servers and web browsers with Real-Time Communications (RTC) capabilities via native and simple Javascript APIs. The Object RTC components are being optimized to best serve this purpose. Our mission: To enable rich, high quality, RTC applications to be developed in mobile endpoints and servers via native toolkits, simple Javascript APIs and HTML5. It is also a mandate that Object RTC be compatible with WebRTC. The Object RTC initiative is a project supported by Hookflash, Microsoft, Google and others. This page is maintained by the Hookflash team. The ORTC C++ Library is a project sponsored by Hookflash. To sponsor ORTC Lib projects send an email to sponsor@ortc.org

2008 07 30 Legal Issues In Open Source

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Fosdem17 - Mixed License FOSS Projects

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Many projects start out with the intention of staying single license FOSS projects. As your project grows, reality hits: some components or files may need to use different licenses than originally anticipated. There are many reasons why this can happen: you may need to interface with projects of another license, you may want to import code from other projects or your developers may not understand the subtleties of the licenses in use. Besides the obvious challenges of managing mixed license FOSS projects, such as license compatibility and tracking what licenses you use, you are running the risk of exposing your project to unintended consequences. This talk will explore unintended consequences, risks and best practices using some examples from the recent history of the Xen Project. In particular we will cover: 1. Refactoring can lead to licensing changes: best practices and unintended consequences when importing code from elsewhere. Making code archeology easy from a licensing perspective and why it is important. 2. A worked example of a license change of a key component: process, pain points, their causes and how they could have been avoided 3. The perils of LGPL/GPL vX (or Later): the unintended consequences of not providing pre-defined copyright headers in your source base We will conclude with a summary of lessons and best practices.

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