Users and applications also experience federated naming through the file system. The initial context is located under /xfn in the root directory. For example, user ingrid's to_do file has the XFN name, xfn/user/ingrid/fs/to_do.
To read this file, you could type:
% cat /xfn/user/ingrid/fs/to_do
Applications access the files under /xfn just as they do any other files. Applications do not need to be modified in any way, nor do they need to use the XFN API.