Sun Java System Web Server web applications include two deployment descriptor files:
A J2SE standard file (web.xml), described in the Java Servlet 2.3 specification (chapter SRV .13, “Deployment Descriptor”). You can find the specification here:
An optional Sun Java System Web Server-specific file (sun-web.xml), described later in this chapter.
The easiest way to create the web.xml and sun-web.xml files is to deploy a web application using the Sun Java Studio. For example, web.xml and sun-web.xml files, see Sample Web Application XML Files.