+The @code{nnrss} back end saves the group data file in
+@code{nnrss-directory} (see below) for each @code{nnrss} group. File
+names containing non-@acronym{ASCII} characters will be encoded by the
+coding system specified with the @code{nnmail-pathname-coding-system}
+variable. If it is @code{nil}, in Emacs the coding system defaults to
+the value of @code{default-file-name-coding-system}. If you are using
+XEmacs and want to use non-@acronym{ASCII} group names, you should set
+the value for the @code{nnmail-pathname-coding-system} variable properly.
+
+@cindex OPML
+You can also use the following commands to import and export your
+subscriptions from a file in @acronym{OPML} format (Outline Processor
+Markup Language).
+
+@defun nnrss-opml-import file
+Prompt for an @acronym{OPML} file, and subscribe to each feed in the
+file.
+@end defun
+
+@defun nnrss-opml-export
+Write your current @acronym{RSS} subscriptions to a buffer in
+@acronym{OPML} format.
+@end defun
+