Which can be further analyzed, centrifugal structure or centripetal structure?

The centrifugal structure and centripetal structure can be further analyzed and compared as follows:

A structure in which only one of the two direct components 1. has the same grammatical function as the whole is called a centripetal structure.

2. A structure in which two direct components do not have the same grammatical function as the whole is called a centrifugal structure.