Summaries take the same arguments as Reports.
The database schema can be found in the application is the user has database::read permission by going to menu: Admin -> Database -> List Tables, then clicking on the details button for the table.
API / Web Access
You can access the collection using the normal Open-AudIT JSON based API. Just like any other collection. Please see The Open-AudIT API documentation for further details.
Shipped are a set of default items. These can be found by going to menu: Help → Defaults → Discovery Scan Options.