DB migration scripts for Portal 6.5.2 sp3 to MWS 7.1.2

Hi All
Can you please let me know if there are any migration scripts for DB migration from 6.5.2sp3 portal server to 712 MWS server
I checked the upgrade guide the MWS migration are available only from 7.0 . So how do we migrate the portal server data to 7.1.2?