This page describes the migration performed via the transformation rules during a major upgrade of Sentinel IP-SM-GW.
Transformation rules are very version specific, so make sure that you are reading the docs for the specific version you are ungrading to.
The rules performed the following:
Transformation rules for upgrading IPSMGW 3.0.0 to 3.1.0-TRUNK
Detailed descriptions are yet to be written.