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- An input step can be connected to only one transformation or output step.
- A transformation step cannot be connected to an input step, but to another transformation or output step.
- All types of transformation steps, except the split step, can only be connected to one other step.
- A split step can be connected multiple times.
- A merge step can accept multiple inputs.
- Connections can only be made to an output step, but it cannot be the origin of a connection.
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