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
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-->
<!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。