Some operators, such as the Concatenate operator, require their input parameters to be in a certain order. The order is determined by dynamic slots in the operator object.
Operators like Plus, Concatenate, and Create collection require several incoming connections and one outgoing connection.
Some operators have a precisely defined number of input slots. For example, not equal to has two operands. Other operators, such as the Plus operator, can process any number of operands. For these types of operators, a free slot is created as soon as a new input data object is modeled.