Material Expression Reference Page: "Inputs" and "Outputs" definitions reversed from illustration

On the Material Expression Reference Page, located here:
https://docs.unrealengine.com/latest/INT/Engine/Rendering/Materials/ExpressionReference/index.html

Material Expressions has an image numbered 1-5 where "3" points to "Inputs" and "5" points to "Outputs" and the key below has these reversed.