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WURFL
WURFL (Wireless Universal Resource FiLe) is a set of proprietary application programming interfaces (APIs) and an XML configuration file which contains information about device capabilities and features for a variety of mobile devices, focused on mobile device detection. Until version 2.2, WURFL was released under an "open source / public domain" license.〔(【引用サイトリンク】title=New WURFL Snapshot available, BUT WITH IMPORTANT CHANGE )〕 Prior to version 2.2, device information was contributed by developers around the world and the WURFL was updated frequently, reflecting new wireless devices coming on the market. In June 2011, the founder of the WURFL project, Luca Passani, and Steve Kamerman, the author of Tera-WURFL, a popular PHP WURFL API, formed ScientiaMobile, Inc to provide commercial mobile device detection support and services using WURFL.〔Krishna Guda, CEO, ScientiaMobile, Inc ("WURFL Team Launches ScientiaMobile" ), June 6, 2011, accessed June 27, 2011.〕 As of August 30, 2011, the ScientiaMobile WURFL APIs are licensed under a dual-license model, using the AGPL license for non-commercial use and a proprietary commercial license. The current version of the WURFL database itself is no longer open source.
== Problem of device fragmentation ==
The desktop web-channel; which is primarily divided up between a handful of browsers, relies on HTML as its markup, and content written as HTML can be expected to be visible to most users of a web-based channel via one of the standard browsers (Internet Explorer, Mozilla Firefox, Safari, Opera, and so on). Software updates for desktop browsers are frequently made and widely distributed.
Unlike the desktop web-channel, there is a tremendous amount of fragmentation in the mobile device-channel. Markup can be WML, HTML, HDML, XHTML Mobile Profile, etc. In addition, unlike a standard desktop web-channel, a wireless-device channel will vary on screen size, ability to support client side scripting, ability to support various image formats, and even color. Because the markup is generally sent directly to the phone, there is no opportunity for a central server to "fix" or adapt to browser limitations or defects. Software updates for mobile browsers are rare.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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