Read Entity Data

Hey guys,

I already figured out how to read entity data (for example BP_HEADER - Data Model for Customer) in general, but still have a few detail questions. At the moment I am using Convenience API using following approach:

1. CONVENIENCE API -> GET_INSTANCE
2. SET ENVIRONMENT -> Change request number
3. GET OBJECT LIST -> For entity keys (still not sure if this is the right method?)
4. GET_ENTITY_STRUCTURE -> Get key components
5. GET_ENTITY_STRUCTURE -> Get attribute components
6. Fill key structure
7. READ_ENTITY_DATA

My Questions:

1. I am not sure if the approach for getting the entity key data (step 3) is the best way?
2. Reading Entity AD_EMAIL -> Leading Entity: ADDRNO + BP_HEADER, Qualifying Entity: AD_CONSO

        Where can I get the data of AD_CONSO??

3. Reading Entity AD_POSTAL -> Leading Entity: ADDRNO + BP_HEADER, Qualifying Entity: AD_NATION

        Where can I get the data of AD_NATION?

4. Reading Entity BP_CUSGEN -> Leading Entity: ASSGNM_ID + BP_HEADER

        Where can I get the data of ASSGNM_ID?

Thanks and regards

Chris