Values.AlternateKeySourceDefines an alternate key. This value is optional. A legacy data set might not have any alternate key defined but if those alternate keys definitions exist, provide them, as some applications will make use of them.
type nonrec t = {allowDuplicates : Boolean.t option;Indicates whether the alternate key values are supposed to be unique for the given data set.
*)length : Integer.t;A strictly positive integer value representing the length of the alternate key.
*)name : String_.t option;The name of the alternate key.
*)offset : Integer.t;A positive integer value representing the offset to mark the start of the alternate key part in the record byte array.
*)}