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Open core is a business model for the monetization of commercially-produced open source software. Coined by Andrew Lampitt in 2008, the open core model primarily involves offering a "core" or feature-limited version of a software product as free and open-source software, while offering "commercial" versions or add-ons as proprietary software, or offering paid services such as premium technical support for the software. The concept of open core software has proven to be controversial, as many developers do not consider the business model to be true open source software. Despite this, open core models are used by a large number of open source software companies.〔(【引用サイトリンク】url=http://www.linuxinsider.com/story/66807.html )〕 ==Examples== * Oracle's MySQL database software is dual-licensed under a proprietary license, and the GNU GPL; proprietary versions offer additional features and enterprise support plans.〔(【引用サイトリンク】url=http://www.h-online.com/open/features/Open-core-or-dual-licensing-The-example-of-MySQL-1367824.html )〕 * Rapid7, with its Metasploit Pro and Metasploit Express products which are based on the open source Metasploit core framework. * Talend uses an Open Code license for its data management, data integration and cloud products. 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 core」の詳細全文を読む スポンサード リンク
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