The context.xml file contains the default Context element used for all web applications in the system. The supported attributes include:
cookies: This is a flag indicating if sessions will be tracked using cookies. The default is true.
crossContext: This is a flag indicating whether the ServletContext.getContext(String path) method should return contexts for other web applications deployed in the calling web application's virtual host.
You can find additional information on the Context element in the Tomcat documentation at http://jakarta.apache.org/tomcat/tomcat-5.5-doc/config/context.html.