1. A method for determining if a first component can be connected to a second component for inclusion in a processing graph, comprising: accessing a first component description, the first component description describing an output object of the first component with a set of tags; accessing a second component description, the second component description describing an input condition of the second component with a set of tags; determining that the first component can be connected to the second component if the set of tags describing the output object includes all tags describing the input condition; and including the first and second connected components in a processing graph if they are connected to each other.