Mac OS X or iOS software development project created with Apple's Xcode programming software; contains project configuration data and links to files referenced by the project. XCODEPROJ files include links to source code files (sources), docs, resources, frameworks, libraries, and products. They also store targets, executables, find results, bookmarks, project symbols, and links to implementation files and interface builder (NIB) files. When a Mac OS X or iOS development project is complete, Xcode can build the XCODEPROJ file project data into an executable program.