Due to lack of formal definition, a sink is often misconstrued with a gateway, which is a similar construct but the latter is usually either an end-point or allows bi-direction communication between dissimilar systems, as opposed to just an event input point .
Due to the lack of a formal definition, a sink is often mistaken for a gateway. Both are similar in nature but differ in their primary function; a gateway typically acts as an endpoint or supports bi-directional communication between dissimilar systems, unlike merely serving as an input point for events.