The Order Fulfilment provides details of those orders that are fulfilled by this document.
For example, In the case of a Diagnostic Imaging Report. A provider has ordered an
X-Ray, it is performed and a radiologist reads the X-Ray and generates the report.
The XRay order identifier is included here and the performed X-Ray procedure in the
Service Event. This allows the document to be associated with the originating order
that it is fulfilling.