You may include data objects in the flow by drawing associations from data objects to and from processes. The Association line is available in the toolbar of the BPMN Business Process diagram. It is a dashed line with an open arrowhead.
Notes
A data object cannot receive or send a Message Flow line, nor a Sequence Flow line.
Modeling data objects is optional. It is not mandatory that you model data objects on a BPMN Business Process diagram. You may decide not to model data objects to show a business process flow without being cluttered by the extra details, or you can add the data objects to the diagram to provide more information without changing the basic behavior of the process flow.
