When someone creates something (like a picture or book), they can choose to make that work "open". This means that other people are allowed to copy it and change it if they want. Something that is open content may be free of charge, but it does not have to be.
The Simple English Wikipedia is open content. So are other Wikipedias. If a person changes open content or makes new open content, everyone can give it to anyone else, or even sell it. It is never needed to ask permission to do this, because the people who wrote the text already gave their permission when they clicked the Save button.
The rules that say how people can use, change and pass around open content are called a license. A license explains exactly what you are allowed to do with the content that falls under it.
The makers of open content get to choose what license to use for their work; everyone else has to follow that license. Only the maker, who owns the copyright, can change it to another license.
Most open content licenses insist that, whenever others change, sell or pass around the work, they also declare it to be open, under the same license. The good turn gets passed on.
All the content in Wikipedia is open under the rules of the GNU Free Documentation License, a very well-known open content license. Other well-known open content licenses are the Creative Commons licenses.
Si osou Edit
|This page uses content from Wikipedia. The original article was at simple:Open content. The list of authors can be seen in the page history. As with Babyish Wiki, the text of Wikipedia is available under the GNU Free Documentation License.||Nigè peij kontein kontent from Wikipidia. Orijinol-dè artikol-wa à simple:Open content, en ano-artikol dè òŧā list ga à edit històry peij. Seim as Babyish Wiki, kontent from Wikipidia ga koncrolen bai GNU Free Documentation License.||本頁面利用了來自維基百科的內容，原文是simple:Open content。原文的作者列表可以參考編輯歷史頁面。正如Babyish Wiki一樣，維基百科的內容都依從GNU Free Documentation License條件發布。|