Add a new onlySingleMatch parameter. Name : onlySingleMatch Cardinality : 0..1 Type : boolean Documentation :  If there are multiple potential matches, the server should identify the single most appropriate match that should be used with future interactions with the server (for example, as part of a subsequent create interaction).   We will also update the Documentation for onlyCertainMatches to: If there are multiple potential matches, the server should be certain that each of the records are for the same patients.  This could happen if the records are duplicates, are the same person for the purpose of data segregation, or other reasons.  When false, the server may return multiple results with each result graded accordingly.