As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO DFW DUE TO THE FLIGHT CREW REPORTING AFT CARGO DOOR SHOWED OPEN AT 2000 FEET ON DEPARTURE. ECAM CLEARED ON LANDING. THE AIRCRAFT LANDED SAFELY AT DFW WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED PROXIMITY SENSOR 32WV AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.