The migration process is quite complex when you are transfering data between versions of Sitecore with a large gap between versions (for example Sitecore 4.3.X and Sitecore 5.3). You should have a sound knowledge in both versions of Sitecore to ensure that the transfer goes as smoothly as possible.
Transferring Process and Options
Crawled: On December - 29 - 2008 Source
