FQL is a query language that allows you to retrieve, filter and project data from any data source containing FHIR Resources. It brings the power of three existing languages together: SQL, JSON and FhirPath. It allows you to create tables and is useful for gaining insight and perform quality control.
<OperationOutcome xmlns="http://hl7.org/fhir"> <issue> <details> <text value="Error expanding ValueSet "null: Error unmarshalling resource: Unable to provide support for code system urn:oid:2.16.840.1.113883.3.1937.777.13.5.999.1" /> </details> </issue> </OperationOutcome>