Recurrence FHIRconnect complexity lies in dealing with recurrence resulting from he different cardinalities contained in the models. When mapping recurring elements, it is crucial to align both FHIR and openEHR data types at the same level. Otherwise, recurring elements may not function correctly, leading to data overwriting instead of properly mapping all occurrences. There are three types of how recurrences are dealt with. Overwriting a path Populating an child of an 0..n element Appending to a 0..n These are explained in the following chapters. Hierarchy Mappings Overwriting