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.
Invocations
URL: [base]/Measure/$evaluate-measure
URL: [base]/Measure/[id]/$evaluate-measure
Parameters (In)
| Name | Cardinality | Type | StructureDefinition | Documentation |
| periodStart | 1..1 | Date | The start of the measurement period. In keeping with the semantics of the date parameter used in the FHIR search operation, the period will start at the beginning of the period implied by the supplied timestamp. E.g. a value of 2014 would set the period start to be 2014-01-01T00:00:00 inclusive | |
| periodEnd | 1..1 | Date | The end of the measurement period. The period will end at the end of the period implied by the supplied timestamp. E.g. a value of 2014 would set the period end to be 2014-12-31T23:59:59 inclusive | |
| measure | 0..1 | Reference | Measure | The measure to evaluate. This parameter is only required when the operation is invoked on the resource type, it is not used when invoking the operation on a Measure instance |
| reportType | 0..1 | Code | The type of measure report, patient, patient-list, or population. If not specified, a default value of patient will be used if the patient parameter is supplied, otherwise, population will be used | |
| patient | 0..1 | Reference | Patient | Patient to evaluate against. If not specified, the measure will be evaluated for all patients that meet the requirements of the measure. If specified, only the referenced patient will be evaluated |
| practitioner | 0..1 | Reference | Practitioner | Practitioner to evaluate. If specified, the measure will be evaluated only for patients whose primary practitioner is the identified practitioner |
| lastReceivedOn | 0..1 | DateTime | The date the results of this measure were last received. This parameter is only valid for patient-level reports and is used to indicate when the last time a result for this patient was received. This information can be used to limit the set of resources returned for a patient-level report |
Return Values (Out)
| Name | Cardinality | Type | Documentation |
| return | 1..1 | MeasureReport | The results of the measure calculation. See the MeasureReport resource for a complete description of the output of this operation |
The effect of invoking this operation is to calculate the measure for the given patient, or all patients if no patient is supplied, and return the results as a MeasureReport resource of the appropriate type