Converting from Trim 7.1 to HP RM 8.3

What would happen if you tried to upgrade a 7.1. dataset schema 162 directly to RM 8.3? Just curious.

The installation documentation says that you have to upgrade to a 7.2 dataset (upgrading the schema) before you go to RM 8.3.  Is this all I have to do with the 7.1 dataset before I go to 8.3?