Nope. Guy's got it right. 'Perpendicular' (or 'orthogonal' if you prefer), meaning that the concerns are on separate axes, and thus independent of each other.

Nope. Guy's got it right. 'Perpendicular' (or 'orthogonal' if you prefer), meaning that the concerns are on separate axes, and thus independent of each other. SOAP is a bit weird because it's both an envelope/delivery mechanism as well as a discovery/interface negotiation methodology. REST is just straight up a set of interface design principles. It doesn't care what you're delivering, it doesn't care about the channel you deliver it through.