By selecting one of the formats you can export the publications of the page /user/folke/surename in that format.
FILENAMEwith the name you gave the file while saving it and omitting the
The export filters marked with a star * are from JabRef, a tool to manage publication references on the desktop. It includes a mechanism to write layout files which allow the export of references in a nicely formatted way. BibSonomy includes some of these layout filters and additionally allows you to upload your own custom filter on the settings page. Information on how to write such a layout filter can be found here.