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Version (2): 
UML for version 1.4 (see OpenMI documentation index http://public.deltares.nl/download/attachments/6360086/org.OpenMI.Standard_UML_A3format.v.1.4.pdf?version=1)
Unchanged interfaces
IArgument
IDimension
IListener
IManageState
IPublisher
ISpatialReference
ITime
ITimeSpan
ITimeStamp
IUnit
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