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For questions about works that derive their core from another open work.

A derivative, or derived, work is one that derives (hence the name) the core of itself (for example core code, code for extra functionality, or perhaps part of a creative work) from another open work. This is made possible by the various licenses we see, such as the MIT and GPL licenses, and the Creative Commons family of licenses for creative works. In many cases, a derivative work can be made very simply by copying the part of the work you're interested in, incorporating it into your project, and crediting the original author.

Use this tag for questions about these works, including about their legal status and creation.