SearchEntryMode
Why an entry is in the result set - whether it's included as a match or because of an _include requirement.
This code system http://hl7.org/fhir/search-entry-mode defines the following codes:
| Code | Display | Definition |
| match | Match | This resource matched the search specification. |
| include | Include | This resource is returned because it is referred to from another resource in the search set. |
| outcome | Outcome | An OperationOutcome that provides additional information about the processing of a search. |