The Apple Developer Connection Published Simplifying Data Handling with Uniform Type Identifiers

Uniform Type Identifiers (UTIs) are strings that specify abstract types in Mac OS X. For developers, UTIs can help you take advantage of Launch Services, Navigation Services, Pasteboard Manager andTranslation Services, and work more easily with Spotlight and Automator. This article is for those whose Mac OS X application creates or manipulates data that may be exchanged with other applications or services. [Bill Fox]