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6. Input and output ports

Input and Output Ports

You define ports to get input from the process and to deliver results. In these pages:

• Learn to add ports to your operator.
• Set preconditions to allow only certain input types in your operator and to enable meta data handling.
• Set generation rules to reflect the changes made by your operator in the meta data.
• Use a PortPairExtender to, for example, create throughput ports that simply pass given data through the operator. (This is mostly used to influence the execution order when the operator itself does not need input and output ports.)