The type of link that was used to link the encounter with the APDC record

• exact: episode start and end date/time and facility match
• admit_time_error: episode start date and end date/time and facility match
• disch_dttm_match: episode end date/time and facility match
• admit_disch_date_match: episode start and end date and facility match
• disch_date_match: episode end date and facility match
• admit_date_match: episode start date and facility match
• private_admit_disch_match: episode start and end date match and private facility
• facility_error_admit_disch_match: episode start and end date match