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Restrições permissíveis

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Há certos requisitos e restrições ao uso ou intercâmbio de trabalhos que não sentimos que anule as liberdades essenciais na nossa definição. Estas restrições são descritas a seguir.

Além dessas restrições permitidas, a licença não deve incluir cláusulas que limitem as liberdades essenciais. Especialmente, ela não deve especificar nenhuma restrição ao uso (Tais como proibir o uso comercial do trabalho, restringir o uso dependendo do contexto político, etc.).

Atribuição dos autores[edit]

Attribution protects the integrity of an original work, and provides credit and recognition for authors. A license may therefore require attribution of the author or authors, provided such attribution does not impede normal use of the work. For example, it would not be acceptable for the license to require a significantly more cumbersome method of attribution when a modified version of the licensed text is distributed.

Transmissão das liberdades[edit]

The license may include a clause, often called copyleft or share-alike, which ensures that derivative works themselves remain free works. To this effect, it can for example require that all derivative works are made available under the same free license as the original.

Proteção das liberdades[edit]

The license may include clauses that strive to further ensure that the work is a free work: for example, access to source code, or prohibition of technical measures restricting essential freedoms.

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