These two fields allow to specify a different default assignee for ticket opened against this package in bugzilla. Note: The EPEL field is always displayed for packages in the 'rpms' namespace regardless of whether it is used in bugzilla or not.
xerces-c-2_7_0-8_fc11:EL-5:xerces-c-2.7.0-8.fc11.src.rpm:1249568782