This document is organized into following chapters:

• Architecture of Service Tier: Provides overall architecture of the service tier of OBAPI platform. This chapter will set the context for further chapters and also will introduce you to various terminologies that you will encounter throughout this document
• Extensible Points in Service Tier: Provides in depth knowledge about various extensible hooks available in the service tier.
• Architecture of GUI Tier: Provides overall architecture of the GUI tier of OBAPI platform. This chapter will introduce you to various terminologies that you will encounter for UI extensibility.
• Extensible points in GUI Tier: Provides in depth knowledge about various extensible hooks available in the GUI tier.
• Libraries: Provides a listing of various libraries provided by OBAPI out of the box along with their usage
• Workspace Setup: Provides step by step guidelines for setting up Eclipse workspace for extensibility
• Deployment: Provides information in packaging and deployment of the customized code on Weblogic server
• GUI Tier: Workspace Setup: Provides step by step guidelines for setting up workspace for GUI tier extensibility
• GUI Tier: Deployment: Provides information on packaging and deployment of customized GUI code on HTTP server
• Use Cases: This chapter discusses some of the extensibility points covered in earlier chapters with the help of some use cases.