Data Objects
A data object is used for informational purposes to show how a document or other data relates to the process. It may be associated with a sequence flow or message flow, but it does not affect either flow.
Data objects are usually associated with flow objects with an association:
Note: The data object in the preceding example should not be confused with the actual message being sent between the two pools.
A data object can also be associated with a sequence flow or other flow object:
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