"GNU Licenza Lìbbira di Ducumentazzioni" : Diffirenzi ntrê virsioni

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A GNU Licenza Lìbbira di Ducumentazzioni (GFDL) eni na licenza pi lu cuntinutu apertu. Eni statu criatu di la Fundazzioni pi lu Software Lìbbiru o "Free Software Foundation (FSF) nta lingua angrisi pi lu pruggettu GNU. Inizzialmenti vinni criata pi utilizzarila cu la ducumintazzioni di software, ma puoi s'addunarru ca putìa ssiri usata cu autri tipi di travagghiu uremma.

Comu licenza "copyright", lu GFDL eni nu tipu particulari di cuntrattu tra lu criaturi di travagghiu copyrightabbili (comu a nu libbru, n'articulu d'inciclupidia, nu quatru, o nu spartitu di musica) e chiunqui autri vulissi utilizzàrilu. A GFDL eni cunzidirata "copyleft" picchini a licenza eni pinzata pi ssiri facili pi chiunqui di ssiri utilizzata e riutilizzata lu travagghiu copyleftatu e non pi rendiri l'utilizzu ristrettu.

Si lu travagghiu copyrightabbili eni rilasciatu sutta a GFDL, lu criaturi di lu travagghiu sta dichiarannu ca chiunqui po riprudurri, distribbuiri, o mudificari lu travagghiu vasta ca segunu n'unziemi di specifichi richiesti nta a GFDL. (Propriu picchin a licenza s'"arripruduci" e arrista cu lu travagghiu, chissu alli voti veni ciamatu "licenza virali".)

The GFDL also says that in order to distribute or modify a work licensed with the GFDL, the re-user must give credit to any previous authors of the work, and include a list of changes they made to the work.

Finally, any work licensed with the GFDL must contain, somewhere, the entire text of the license. This provision has been criticized, because it is not always easy to include an entire, long license with a copyrighted work. In a book, for example, it is easy to include one extra page with the license, but if the work is something like a song, or a photograph, it is not easy.

The GFDL has other requirements that are more complicated. For example, if part of the work is labeled as an "invariant section," it cannot ever be removed or changed by someone using the work ("invariant" means "does not change").

Works licensed under the GFDL may be included in with non-GFDL-licensed works only if it is clear which parts of the work are licensed as the GFDL. For example, in a book of poetry it would be easy to label some poems as licensed under the GFDL and some not licensed under it. But it would not be easy to label if part of a song was licensed as GFDL and the rest was not, so this would not be allowed.

Any use of GFDL material which violates the terms of the GFDL is potentially copyright infringement.

A number of online projects use the GFDL. The largest online project to license its content under the GFDL is Wikipedia.Template:Citation needed

The GFDL has been criticized by many people who wish that it made it even easier for content to be re-used. Among the criticisms are that it is very hard to combine GFDL material with other copyleft licenses, that it is not always clear and easy to understand, and that some of its requirements, such as the "invariant sections", are not free at all.

See also

• Simple English "translation" of the GFDL text

Other websites

• Official license text