TransactionKey Field

DefinitionA unique identifier for this record from the immediate source. A string that can include a Uniform Resource Identifier (URI) or other forms. Alternatively, use the TransactionKeyNumeric for a numeric-only key field. The local key of the system. When records are received from other systems, a local key is commonly applied. If conveying the original keys from the source or originating systems, see SourceSystemKey and OriginatingSystemKey.