What is the role and difference between model nodes and ordinary nodes in the flow chart?

In the flow chart, there are various node types, among which the functions and uses of model nodes and ordinary nodes are very different.

Model nodes generally represent reusable subprocesses or modules, i.e., a process template that can be called by multiple processes. It encapsulates specific business logic and avoids repeatedly defining the same steps in different processes, thereby improving the readability and maintenance efficiency of the flowchart.

Ordinary nodes are the basic units of the flow chart, representing specific steps or operations in the process. Each ordinary node has clear inputs and outputs, which are integral to the flowchart.

In short, model nodes are advanced reusable components, while ordinary nodes are basic non-reusable units. The two perform their duties in flowchart design and jointly build a complete flowchart.

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