How to know deep all the tables on the Data Warehouse to acces by JRS?

Hello everyone!
I have a question regarding how to know all the tables on the data Ware house in Rational.
I now that we have 3 types of schemas:

• RIODS
• RICALM
  
• RIDW 

I also read the article Deep Dive Data Warehouse Reporting using the Jazz Reporting Service, but I need to know more, because in my team we have created a custom work item type with the following custom attributes (besides other OOTB attributes):
- 'Stakeholders' custom attribute, represented by the attribute type of 'contributor'.
- 'Score' custom attribute, represented by the attribute type of 'enumeration', with a list of values from 1 to 10.
The purpose of this WI type would be to capture the 'score' which should be provided by stakeholders on how they think the product/solution we deliver is doing.
Then, a JRS report would calculate the average score for each of the Releases (by using OOTB 'Found In' attribute).

The problem that I have is the following:
On the JRS server, I can not find the table that contain 'Stakeholders' custom attribute, .

Additional info about our development environment:
    JRS 5.0.2 including DCC component
    About the Jazz Reporting Service
    Version: 5.0.2
    Build ID: JRS_5.0.2-I20141028-2014
    CCM & JTS are 5.0.2

Many thanks in advance,
Ichi