tiles.xml 文件出错
RT，导入一个新项目的时候发现编译不过，是title.xml出错了，

<?xml version="1.0" encoding="ISO-8859-1" ?>
<!--
/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 */
-->

<!DOCTYPE tiles-definitions PUBLIC
  "-//Apache Software Foundation//DTD Tiles Configuration 2.0//EN"
  "http://struts.apache.org/dtds/tiles-config_2_0.dtd">

<tiles-definitions>

  <definition name="showcase.index" template="/tiles/layout.jsp">
  <put-attribute name="title" value="Tiles Showcase"/>
  <put-attribute name="header" value="/tiles/header.jsp"/>
  <put-attribute name="body" value="/tiles/body.jsp"/>
  </definition>

  <definition name="showcase.freemarker" template="/tiles/layout.jsp">
  <put-attribute name="title" value="Tiles/Freemarker Showcase"/>
  <put-attribute name="header" value="/tiles/header.jsp"/>
  <put-attribute name="body" value="/tiles/body.ftl"/>
  </definition>

  <definition name="showcase.freemarkerLayout" template="/tiles/layout.ftl">
  <put-attribute name="title" value="Tiles/Freemarker Showcase"/>
  <put-attribute name="header" value="/tiles/header.jsp"/>
  <put-attribute name="body" value="/tiles/body.ftl"/>
  </definition>

</tiles-definitions>



错误信息：The content of element type "definition" must match "(icon?,display-name?,description?,put*,putList*)".

求高手指点

------解决方案--------------------
definition这个节点下面的子节点有问题，只能接受的节点是：

(icon?,display-name?,description?,put*,putList*)

? 表示0个或1个；
* 表示0个或多个。