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The Open Game License (OGL) is a public copyright license that may be used by tabletop role-playing game developers to grant permission to modify, copy, and redistribute some of the content designed for their games, notably game mechanics. However, they must share-alike copies and derivative works. ==Language of the license== The OGL describes two forms of content: Open Game Content (or ''OGC'') : Product Identity (or ''PI'') : Product Identity is content covered by normal copyright. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Open Game License」の詳細全文を読む スポンサード リンク
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