Oracle Discoverer Metadata repository

In Discoverer's user edition, you have business areas, folders, and items - most of which are database entries merely named more user-friendly.

I am trying to find the table/column name in Oracle that has some metadata. In Discoverer, there is a business area called The Discoverer 4 EUL. Under folder "EUL 4 FOLDERS & ITEMS," you can see metadata such as folder name, folder description, item name, item description, item hidden, database column, etc. Where is this stuff stored in Oracle? I need the table name please. Thanks for helping.

bump. please help.