This is an old revision of the document!
There are several good reasons to upgrade from an Omnidex version 4.x installation to a 5.x installation.
The best way to currently review all the upgrade notes is to start at the older releases and read through to the newer releases. Even if you are already on 5.0, you should review the upgrade notes on going from 4.x to 5.0 to see all the changes to the Omnidex product.
os> odxsql current.env
odxsql> extract DDL to myddl.sql
odxsql> use myddl.sql
odxsql> connect myddl.xml
odxsql> update indexes