Data Object Reference
A Data Object Reference is used to model the flow of data between Activities or Events.
In a diagram, a Data Object Reference points to a Data Object defined in Process Attributes. You can create multiple references to the same Data Object within a single Process.
You can use a Data Object Reference as a source or target of a Data Association.
Attributes
You’ll find Data Object Reference attributes and other settings within the Attributes panel, under the Attributes tab and other tabs.