xml文件在Myeclipse中出错误

1、在使用dwr的时候，会出现dwr.xml文件报错的问题，
错误如下：
Referenced file contains errors (http://getahead.org/dwr/dwr30.dtd)
修改如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 3.0//EN" "http://getahead.org/dwr/dwr30.dtd">


2、在struts2中xml配置文件报错
如下：Referenced file contains errors (http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd).  For more information, right click on the message and select "Show Details..." 
修改如下：
<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE validators PUBLIC "-//Apache Struts//XWork Validator 1.0.2//EN" "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd"> 


3、最后的办法点击右键Myeclipse-->Remove All Validation Markers