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Group Identifiers

Each duplicate group has an integer identifier called a Set ID. If a document is a member of a duplicate group of a particular type (i.e. has status pivot or duplicate with respect to that type), then the Set ID of the duplicate group it belongs to can be found using the fields brs_near_dup_set_id, brs_exact_dup_set_id, and brs_strict_dup_set_id. If the document is a not a member of a duplicate group of that type (i.e. has status unique or error) then the value of the corresponding Set ID field for that document is null.