The SERIALIZEON keyword allows serialization to be turned on for the specified fields. The SERIALIZEON keyword can be used before, after, or between any IGNORE or MARK statements.
The SERIALIZEON keyword can also be used with the SERIALIZE keyword in the BEGIN LOAD command and with the KEY keyword in the FIELD command. When it is used in this way, the DML-level serialization ignores and overrides the BEGIN LOAD-level serialization.
In addition, the DML serialized APPLYs can be mixed with nonserialized DML APPLYs in the same IMPORT command.