.DVTPLUGIN File Extension
What is a DVTPLUGIN file?
Plugin used by Apple Xcode, an iOS and OS X software development application; contains files, such as .XCPLUGINDATA, that are used to provide capabilities for Xcode; includes functions such as generating .PLIST file structure definitions for applications.
To install DVTPLUGIN files, place them in the ~/Library/Developer/Xcode/Plug-Ins directory. Restart Xcode and the function will be available.
NOTE: In Xcode 4, the DVTPLUGIN file replaced the .XCODEPLUGIN file, which was used in version 3 of Xcode.