Similar to the previous modeling approaches, BPMN distinguishes tasks and subprocesses in the diagram, the latter being indicated by a ’+’ symbol in the rounded-corner rectangle.
You can create a new object (diagram, symbol, or definition) in the child Workspace, and save it.
您可以在子工作区内创建一个新的对象（图表，符号，或者定义），并将其保存。
3
Establishment of a knowledge bank and a diagram bank of the hydraulic system. Component symbol graph and diagrams of commonly-used circuits are stored in the diagram bank.