Agentry Work Manager documentation

Hello experts,

I'm working to prepare the certification exam on Agentry Work Manager 5.0. While Agentry foundations are well described to work with SQL backends, I can't find satisfactory documentation for the Work Manager and the SAP backend :

    - Documentation for the Java stuff (POJOS, Complex Table, Data Table, StepHandler etc)

     - Documentation for the backend stuff (MDOs, Object Handlers, Filters, EFI etc)

Could you please suggest contents and/or examples to take inspiration from.

Thanks