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A description of a file type, such as a form, a document, etc., containing such information as type name and description. Each description applies to a single file type. In addition, there are four meta-types: "updtext", which applies to all text files, "updproj" which applies to all project files, "updlink", which applies to all project links, and "all" which applies to any file type. Types are the foundation for defining actions and macros.