Basic Customization > User Interface Customization > MVC Components > MVC Components Overview > MVC > MVC in Windchill > Request Handling
  
Request Handling
The servlet and servlet mapping for the Web container is defined in <Windchill>\codebase\WEB-INF\web.xml. The below mentioned url patterns are mapped to Spring DispatcherServlet and hence will be termed as MVC requests.
<servlet-mapping>
<servlet-name>MVCDispatcher</servlet-name>
<url-pattern>/servlet/WizardServlet/*</url-pattern>
<url-pattern>/servlet/ActionsMenu/*</url-pattern>
<url-pattern>/servlet/RecentList/*</url-pattern>
<url-pattern>/servlet/Navigation/*</url-pattern>
<url-pattern>/servlet/SuggestServlet/*</url-pattern>
<url-pattern>/servlet/TypeBasedIncludeServlet/*</url-pattern>
<url-pattern>/servlet/UIValidationAJAXServlet/*</url-pattern>
<url-pattern>/ptc1/*</url-pattern>
<url-pattern>/app/*</url-pattern>
<url-pattern>/gwt/*</url-pattern><servlet-mapping>
</servlet-mapping>

<servlet>
<description>MVC Dispatcher Servlet for JCA</description>
<servlet-name>MVCDispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.
DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
The web container, based on the servlet mapping configured, directs all the MVC Requests to Spring DispatcherServlet.