The Arbortext PE Request Manager is implemented as a Java servlet named com.arbortext.e3.E3servlet. The basic components of the servlet are located in the directory PE_HOME\e3\e3, which conforms to the definition of a Web Application in the Java Servlet Specification. The e3\e3\WEB-INF\web.xml contains the basic mappings that tell the servlet container when to invoke the Arbortext PE Request Manager servlet. (The web.xml file is described in Configuration Guide for Arbortext Publishing Engine.) The Arbortext PE Request Manager may be loaded either when the servlet container starts executing (the default) or when the servlet container receives the first HTTP request for the Arbortext PE Request Manager.