Search parameter features

This section describes optional features that you can enable or disable for optimizing how searching works on Oracle HDR-FHIR server.

• Index missing search parameter (: missing)
  When enabled, the : missing modifier can be used on a SearchParameter to find resources where that search parameter has found (or not found) any data in the given resource.
• Index contained resources
  FHIR search parameters of type reference supports a concept called chaining.