DV_IDENTIFIER Identifier Identifier to DV_IDENTIFIER This has several problems. The type is a coding in FHIR and the assigner a reference to an Organization. In openEHR the mapped fields are string. To capture some of the FHIR logic, the type.codings first code should be transformed as described in Coding to String. FHIRpath Cardinality Comment openEHR Cardinality Comment use 0..1 - - period 0..1 - - assigner 0..1 assigner 0..1 see String to Reference value 0..1 id 1..1 type.coding 0..1 take first appearance type 0..1 see Coding to String - - issuer 0..1 String DV_TEXT