Data CLeansing in eBS Fixed Assets

My organisation is embarking on an upgrade from eBS 11i to R12 and we have to clean our existing datasets before they are loaded onto the new target solution.  I am looking at the Fixed Assets and Asset Management Modules within eBS 11i and I want to extract data from these application modules. I am particularly concerned about the Fixed Asset Register, the Asset Maintenance Schedules and the Works Order. How can identify which tables within the Fixed Assets and Asset Maintenance Modules pertain to these Open items and Master/Reference Data?