The configuration file for an application is an XML document.

For JSP pages, you can have an empty document:

<web-app xmlns="http://java.sun.com/xml/ns/j2ee" version="2.4"/>

You can also configure servlets:

<web-app xmlns="http://java.sun.com/xml/ns/j2ee" version="2.4">

   <servlet>
      <servlet-name>MyApp</servlet-name>
      <servlet-class>edu.berkeley.cde.MyApp</servlet-class>
      <init-param>
         <param-name>test</param-name>
         <param-value>yes</param-value>
      </init-param>
      <init-param>
         <param-name>log</param-name>
         <param-value>fine</param-value>
      </init-param>
   </servlet>

</web-app>