Preprocessor Sometimes it is necessary to execute a logic, before the rest of the body is processed. This part is contained in the preprocessor. Only Hierarchy Mappings and Conditions are allowed here. preprocessor: fhirCondition: targetRoot: $resource.verificationStatus targetAttribute: coding operator: not of criteria: entered-in-error mappings: # body - name: dateTime with: fhir: $resource.onset openehr: $archetype/data[at0001]/items[at0077] unidirectional: openehr->fhir Body Variables