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A '(1)' suffix of the attribute name specifies that a value with only one character will be interpreted as initial, and match with any value starting with this characterthe first character need to match.
A question mark('?') after a field name specifies that a missing value in received HL7 ADT messages will match with any value for that field in existing Patient Records, as Patient Records with missing values for that field will match with any value for that field in received HL7 ADT messages. Field names without question marks specifies, that HL7 ADT messages without values for such fields will not match any existing Patient Record, and Patient Records without values for such fields will not get selected on receive of any HL7 ADT message.
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