There are four primary components to a K2 application: data, forms, workflow, and reports. Components interact with each other to form a complete application. You have already created two data elements in the previous step (the external data source connections). In this step, you generate application elements from the Expense Claim list, creating the primary SmartObject, views, forms, and reports for the application. You create the workflow element in a later step, to demonstrate how to manually build a workflow.
You are now on the Create K2 Application page. You can select from the four components: Data, Forms, Workflow, and Reports. Because you are generating application elements from a list, K2 assumes you want to create a SmartObject to interact with the list, so K2 preselects the data option for you. The forms component generates new, edit, and display forms that you can use in place of the standard SharePoint forms. SmartForms allow greater flexibility to edit both the layout and behavior over SharePoint forms. The reports component generates out-of-the-box reports that you can extend using reporting controls for SmartForms.
After the elements generate, the K2 Application elements page opens. The base application elements include new, edit, and display views and forms, the Expense Claim SmartObject, and the reporting elements.
In this step, you generated the data, forms, and reports application elements based on the Expense Claim list. The elements include views, forms, and a SmartObject. In a later step, you add the workflow element. In the next step, you create another data component. This is a new SmartObject that stores the "details" records, or expense claim line items.