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.
<MessageDefinition xmlns="http://hl7.org/fhir"> <id value="patient-notification" /> <url value="https://fhir.nhs.uk/R4/MessageDefinition/patient-notification" /> <identifier> <system value="https://tools.ietf.org/html/rfc4122" /> <value value="c5f14f39-3c68-4a93-ae31-b98f6fddfef5" /> </identifier> <version value="1.0.0" /> <title value="Patient Notification" /> <status value="active" /> <date value="2020-10-29" /> <eventCoding> <system value="https://fhir.nhs.uk/CodeSystem/message-event" /> <code value="patient-notification" /> <display value="patient-notification" /> </eventCoding> <category value="consequence" /> <focus> <code value="Claim" /> <profile value="https://fhir.nhs.uk/R4/StructureDefinition/Spine-CommunicationRequest" /> <min value="1" /> <max value="*" /> </focus> </MessageDefinition>