Represents something that happens. Shown as a circle. A thin border for Start, and a thick border for End.
A task or work that is performed. Represented by a rounded-corner rectangle.
Controls the divergence and convergence of sequence flows. Shown as a diamond shape.
Shows the order in which activities will be performed. Represented by a solid line with an arrowhead.
Container representing an organizational entity or process, including all Lanes.
Sub-partition within a Pool to organize activities by role or department.