This code system http://hl7.org/fhir/map-target-list-mode defines the following codes:

CodeDisplayDefinition
firstFirstwhen the target list is being assembled, the items for this rule go first. If more that one rule defines a first item (for a given instance of mapping) then this is an error
shareSharethe target instance is shared with the target instances generated by another rule (up to the first common n items, then create new ones)
lastLastwhen the target list is being assembled, the items for this rule go last. If more that one rule defines a last item (for a given instance of mapping) then this is an error
collateCollatere-use the first item in the list, and keep adding content to it

Last updated on