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Music information company Gracenote changed its database terms to closed-source in 2001. This caused some controversy because Gracenote's ancestor, CDDB, had previously said its database was released under the GPL. In 1998, CDDB was purchased by Escient, a consumer electronics manufacturer, and operated as a business unit within the Indiana-based company. CDDB was then spun off of Escient and in July 2000 was renamed Gracenote.〔 (currently offline, accessed via archive.org)〕 In 1999, freedb, an open source clone of the Gracenote CDDB service, was created by former CDDB users as a non-commercial alternative. The track listing database freedb used to seed its new service was based on the data released for public use by CDDB. The CDDB database license was later changed to include new terms. For instance, any programs using a CDDB lookup had to display a CDDB logo while performing the lookup.〔(【引用サイトリンク】 title=Why freedb.org? )〕 In March 2001, only licensed applications were provided access to the Gracenote database. New licenses for CDDB1 (the original version of CDDB) were no longer available, so programmers using Gracenote services were required to switch to CDDB2 (a new version incompatible with CDDB1).〔 To some, the decision was controversial because the CDDB database was started with the voluntary submission of CD track data by thousands of individual users. Initially, most of these were users of the xmcd CD player program. The xmcd program itself was an open-source, GPL project. Many listing contributors believed that the database was open-source as well, because in 1997, cddb.com's download and support pages had said it was released under the GPL.〔(【引用サイトリンク】title=CDDB Downloads ) (currently offline, accessed via archive.org)〕〔(【引用サイトリンク】title=CDDB News, Information and Support ) (currently offline, accessed via archive.org)〕 CDDB claims that license grant was an error.〔(【引用サイトリンク】title=Technical information and FAQ for the CDDB project )〕 == Patent application == In July 1999 CDDB filed an application for a United States patent, titled ''Method and System for Finding Approximate Matches in Database''. The patent is described as: :"Entertainment content complementary to a musical recording is delivered to a user's computer by means of a computer network link. The user employs a browser to access the computer network. A plug-in for the browser is able to control an audio CD or other device for playing the musical recording. A script stored on the remote computer accessed over the network is downloaded. The script synchronizes the delivery of the complementary entertainment content with the play of the musical recording."〔(【引用サイトリンク】 title=Method and system for finding approximate matches in database )〕 was issued in May 2005, and has since been referenced by 66 other patents. 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「Gracenote licensing controversy」の詳細全文を読む スポンサード リンク
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