Duvidas sobre struts

<%@ taglib uri="/tags/struts-logic" prefix="logic" %> 
<logic:redirect forward="welcome"/> 

<%-- 

Redirect default requests to Welcome global ActionForward. 
By using a redirect, the user-agent will change address to match the path of our Welcome ActionForward. 

--%>

<?xml version="1.0" encoding="ISO-8859-1" ?> 

<!DOCTYPE struts-config PUBLIC 
          "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" 
          "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd"> 
<struts-config> 

<!-- ======================================== Form Bean Definitions --> 
    <form-beans> 
    </form-beans> 

<!-- ================================= Global Exception Definitions --> 

    <global-exceptions>        
    </global-exceptions> 

<!-- =================================== Global Forward Definitions --> 

    <global-forwards> 
       
        <!-- Default forward to "Welcome" action --> 
        <!-- Demonstrates using index.jsp to forward --> 

        <forward 
            name="welcome" 
            path="/Welcome.do"/> 
    </global-forwards> 

<!-- =================================== Action Mapping Definitions --> 

    <action-mappings> 
            <!-- Default "Welcome" action --> 
            <!-- Forwards to Welcome.jsp --> 
        <action          
            path="/Welcome" 
            type="actions.FilmeAction"            
         scope="session"          
         unknown="false" 
         validate="false"> 
            <forward 
               name="success" 
               path="/pages/Filme.jsp" 
               redirect="false" 
               contextRelative="false" /> 
      </action> 
                
    </action-mappings> 
    
<!-- ===================================== Controller Configuration --> 

    <controller 
       processorClass="org.apache.struts.tiles.TilesRequestProcessor"/> 
       
<!-- ================================ Message Resources Definitions --> 

    <message-resources parameter="resources.application"/> 
    
<!-- ======================================= Plug Ins Configuration --> 

  <!-- ========== Tiles plugin ===================  -->  
  <!-- comment following if struts1.0.x --> 
  
  <plug-in className="org.apache.struts.tiles.TilesPlugin" > 
    <set-property property="definitions-config" 
                    value="/WEB-INF/tiles-defs.xml" /> 
    <set-property property="moduleAware" value="true" /> 
    <set-property property="definitions-parser-validate" value="true" /> 
  </plug-in> 

  <!-- end comment if struts1.0.x --> 

  <plug-in className="org.apache.struts.validator.ValidatorPlugIn"> 
    <set-property 
        property="pathnames" 
        value="/WEB-INF/validator-rules.xml,/WEB-INF/validation.xml"/> 
  </plug-in> 

</struts-config>