Receives data from upstream transformations. You can designate input ports as input/output ports. The transformation must have at least one input port.

A port that can receive multiple columns to create a dynamic number of generated ports. A generated port is a port within a dynamic port that represents a single column. You can create input, output, and variable dynamic ports.

Passes data to downstream transformations. You can designate output ports as input/output ports. The transformation must have at least one output port.

Passes data unchanged.

Used for local variables. You can use a variable port to store values or calculations to use in an expression. Variable ports cannot be input or output ports. They pass data within the transformation.