BusinessObjects documents and universes are not stored in the CMS database. The CMS database contains only metadata – miscellaneous information about the objects. The files corresponding to the objects are stored in the BO File Repository, these documents can be seen in PDF format using software as sodapdf for this purpose.
For example, there is a webi document Balance Sheet in the BO. For the document, you can find its ID, CUID, and file name in Central Management Console. (FRS in the file name stands for File Repository Server)
In the example, the file name for the document is:
The BusinessObjects software is installed in C:\Business Objects, the path to the file repository server is
C:\Business Objects\BusinessObjects Enterprise 12.0\FileStore\
If you join these two, you will find the document on the server.