When WebFOCUS is installed, it is configured to invoke the WebFOCUS client using the WebFOCUS Servlet:
The WebFOCUS Servlet resides on the same machine as the web server and routes requests from that server to the WebFOCUS Reporting Server, as the following diagram illustrates:
This configuration includes complete support for WebFOCUS features and accepts variables from the standard WebFOCUS script (WFS) files, installed by default in the WebFOCUS Client.