Currently you can export one at a time the existing roles but I cannot see any way to:
- Export/import all of them all at once.
- Export an existing moodle role (one that comes with the default moodle installation).
- Re-Import a default moodle role from an exported XML role presets file.
Role settings are just too many checkboxes and I would like to create a way to duplicate the existing roles and their settings easily.