官方教材引用(CATIA 精华所在):
Publishing geometric elements is a way to design in context easily. You can rename published element and then create links between them. The reconnection between those elements are also more stable and more intuitive.
Published geometry becomes useful when you replace a component and when the replaced component is involved in a constraint or driving other contextual components.
When you replace a published component that is involved in assembly constraints, it is possible to have automatic reconnection of the constraints.thanks to published geometry .
When you replace a published component which contains geometry leading other contextual components of the assembly, there can be automatic reconnection to the external references thanks to published geometry.