WAR
Configuration 
Configuration
consists of providing the information that the Web Container uses for
deployment and at runtime. You provide the required information in the
deployment descriptors. The standard deployment descriptor is web.xml. The deployment descriptor web-j2ee-engine.xml
contains additional
entries specific to the SAP J2EE engine. The DTD for this descriptor is 
web-j2ee-engine.dtd.
Configuration is extensively covered under J2EE Web Components Configuration.
Process Flow
Both the deployment descriptors are automatically generated when you create a Web Module project. For more information, see Creating Web Module Projects or Creating Web Module DC Projects. They are also automatically updated in the project each time changes are made in the project.
You can further edit the deployment descriptors using the multipage editor. For more information, see: