{HEAD ~ The user roles} in {TAIL ~ the role database} are available for use by a plurality of users of the application 
{ HEAD ~ The user roles } in { TAIL ~ the role database } are available for use by a plurality of users of the application
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH