Internet Application Development 
Purpose
This process describes the main steps you have to take in the SAP@Web Studio to develop Internet applications driven by the Internet Transaction Server (ITS).
Prerequisites
You have defined the business logic in the R/3 System:
You must do this first, because you need to be able to specify the underlying ABAP program and screen numbers when creating HTMLBusiness templates.
In this case, it is not essential to define the business logic first, but it makes sense to follow the procedure described in this documentation.
Process Flow
To develop an Internet application that accesses data in the R/3 System and can be run from a Web browser, you must create an Internet Transaction Server (ITS) service.
The steps specified below describe how to:
Creating a New Service
You can assign several services to one project.
Define an ITS site.Modifying an Existing Service
You can import files from the ITS server, or from the Web server, or check them out of ITS source control.
If you import the files from ITS source control, you must
Result
You can now run the new or modified application from a Web browser.