Hi K2 Developer,

Please check with this link "out-of-the-box SmartObjects are created for the K2 Workspace Reports. Custom access to these SmartObjects (for example, accessing the SmartObject via .NET Code or a Custom Report) provides external systems with the report information" ,

 http://help.k2.com/onlinehelp/K2Five/DevRef/5.2/default.htm#Reference/SmO/Workflow-Reports.html

Should you find the above information answered your question, feel free to mark such as "Accepted Solution,Kudo and/or MeToo options".

Kind regards;

Widson.