The file reference feature provides a handy way for you to associate your design with whatever kind of external files, to aid in the explanation and studying of design. You can make a UML use case link to a set of requirement specification, make an entity in ERD link to a scanned copy of order form, make an activity in business process diagram link to a document of instruction, etc.
Knowing that different people may store the same files in different places, in order to make the referenced files accessible in any environment, one can define a user path to the folder where the files are stored. Users can replace the user path themselves to make the file reference accessible in their own environments. Read more