OpenGamma Data Dictionary


I am learning OG for a while, and there is always a question in my brain, is there any data dictionary document I can refer to learn more on the database groups and fields:
Reference data on companies, securities, customers, and markets
Market data (both live and historical)
Portfolio data indicating what a firm has traded
Configuration data storing the types of calculations that users need performed
Result data for past calculations
Or based on my understanding, the only black box of the database is the position data, and OG provides the document online, and the others are based on the third party data design, like bloomberg, OG applied bloomberg open symbol to manage the Market Data and Reference Data.