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Open content is a neologism coined by David Wiley in 1998 which describes a creative work that others can copy or modify. The term evokes open source software, which is a related concept in software. When the term OpenContent was first used by Wiley, it described works licensed under the Open Content License (a non-free share-alike license, see 'Free content' below) and perhaps other works licensed under similar terms.〔 It has since come to describe a broader class of content without conventional copyright restrictions. The openness of content can be assessed under the '5Rs Framework' based on the extent to which it can be reused, revised, remixed and redistributed by members of the public without violating copyright law. Unlike open source and free content, there is no clear threshold that a work must reach to qualify as 'open content'. Although open content has been described as a counterbalance to copyright,〔(【引用サイトリンク】title=Lawrence Liang, "Free/Open Source Software Open Content", ''Asia-Pacific Development Information Programme: e-Primers on Free/Open Source Software'', United Nations Development Programme – Asia-Pacific Development Information Programme, 2007. )〕 open content licenses rely on a copyright holder's power to license their work. == Definition == The OpenContent website once defined OpenContent as 'freely available for modification, use and redistribution under a license similar to those used by the Open Source / Free Software community'.〔 However, such a definition would exclude the Open Content License (OPL) because that license forbade charging 'a fee for the () itself', a right required by free and open source software licenses. The term since shifted in meaning. OpenContent "is licensed in a manner that provides users with free and perpetual permission to engage in the 5R activities."〔 The 5Rs are put forward on the OpenContent website as a framework for assessing the extent to which content is open:
This broader definition distinguishes open content from open source software, since the latter must be available for commercial use by the public. However, it is similar to several definitions for open educational resources, which include resources under noncommercial and verbatim licenses. The Open Definition, which purports to define open content and open knowledge, draws heavily on the Open Source Definition; it preserves the limited sense of open content as libre content.〔(【引用サイトリンク】 work = OpenDefinition.org )〕 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 content」の詳細全文を読む スポンサード リンク
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