@startuml
PDM -> PdmObject: fieldChangedByUi(changedField, oldValue, newValue)
note right: Called for changed UI field (by the user)

PDM -> PdmObject: defineUiOrdering(uiOrdering)
note right: Called each time the view have to be rebuilt, also after UI field change

PDM -> PdmObject: calculateValueOptions(fieldNeedingOptions)
note right: Called for each visible field
@enduml