(1) A pattern or model designed to guide development in accordance with a specific predefined format or structure. (2) In Xcode, a structured set of default resources (files, folders, frameworks, and so forth) necessary for a specific type of programming project. (2) In Quartz Composer, a composition file that contains a basic set of patches for a particular purpose. (3) In a WebObjects component, a file containing HTML that specifies the overall appearance of a Web page generated from the component.