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.
<Observation xmlns="http://hl7.org/fhir"> <id value="9d101056-7ec6-48bc-97ca-a0488deaffbd" /> <meta> <versionId value="1" /> <lastUpdated value="2021-03-12T10:55:53.530-05:00" /> <source value="#hmb2CwhwUe7JwMoC" /> </meta> <status value="final" /> <category> <coding> <system value="http://terminology.hl7.org/CodeSystem/observation-category" /> <code value="laboratory" /> <display value="laboratory" /> </coding> </category> <code> <coding> <system value="http://loinc.org" /> <code value="24108-3" /> <display value="Cancer Ag 19-9 [Units/volume] in Serum or Plasma" /> </coding> <text value="Cancer Ag 19-9 [Units/volume] in Serum or Plasma" /> </code> <subject> <reference value="Patient/06cd81b5-b901-4e5b-9f64-74a0ef1ea433" /> </subject> <encounter> <reference value="Encounter/97b3a7bd-a2c3-4e9d-a169-74ed4c730739" /> </encounter> <effectiveDateTime value="2017-11-11T18:29:17-05:00" /> <issued value="2017-11-11T18:29:17.065-05:00" /> <valueQuantity> <value value="23" /> <unit value="U/mL" /> <system value="http://unitsofmeasure.org" /> <code value="U/mL" /> </valueQuantity> </Observation>