Ask for help: Where could I get the repository design doc?

Hi Folks,
I am new to jazz development. Now, I am going through rtc repository design.
I saw workitem.ecore. And I find some seemly predefined schema. such as:

WorkItemModel
teamModel
model
teamPackage
BasePackage>com.ibm.team.workitem.common.internal
dbMapQueryablePropertiesOnly->false
guardGetters->true
readAccessPolicy->PROTECTED
...............................

So, Could you please tell me where I could find the repository schema?
Thanks in advance.

Regards,
Allen