Web.xml Schema

DTD or XSD

dtd

<!DOCTYPE web-app PUBLIC
     "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
     "http://java.sun.com/dtd/web-app_2_3.dtd" >

  <web-app></web-app>

xsd

<?xml version="1.0" encoding="UTF-8"?>

    <web-app xmlns="http://java.sun.com/xml/ns/javaee" 
             version="2.5" 
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
             xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> 


    </web-app>