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Web Applications As Sender 
If you want to jump from a Web application to a transaction or ABAP/4 report using the RRI, first you need to install an Internet Transaction Server (ITS) for the target system. The transaction or ABAP report is than displayed in the SAP GUI for HTML, which is part of the ITS. The ITS is also used for jump targets within the BI server. However, this does not have to be installed separately because it is automatically included in a BI system.
The URL for starting a transaction in SAP GUI for HTML is generated by the BI server.