Address objects store a patient’s address information in a system record or SBR. Each address is identified by an address type. Each system record or SBR can store multiple addresses, but can only store one address of each type. For example, a record can have a home and a business address, but cannot have two home addresses. By default, the survivor calculator determines which system record addresses to store in the SBR by looking at all system record addresses. If each address type is unique, then all addresses are included in the SBR. If there are multiple addresses of one type, the survivor calculator determines which address to store in the SBR.