BPMN Assignments specify which value should be assigned to which property (and have therefore a completely different semantic as the ARIS model assignments).

BPMN assignments are modeled with the assigns connection which creates a connection from the assigning object towards the target property. The actual value which should be assigned is defined at the connection attribute from (AT_BPMN_ASSIGN_EXPRESSION), the assign-time specifies if the assignment should be made before the start of the activity or after it was completed.

One Activity/Sub Process / Gateway / etc can have multiple property assignments. Each assignment is modeled with a separate connection towards the target property.