Mr. Ford, Please Help With My Tile Problem

My tiles-defs.xml looks like:

<!DOCTYPE tiles-definitions PUBLIC
       "-//Apache Software Foundation//DTD Tiles Configuration//EN"
       "http://jakarta.apache.org/struts/dtds/tiles-config.dtd">
<tiles-definitions>
    <definition name=".article.Base" path="/article/common/layouts/Article.jsp">
      <put name="title"     value ="${title}"/>
      <put name="header"    value="/article/common/header.jsp"/>
      <put name="message"   value="/article/common/message.jsp"/>
      <put name="content"   value="${content}"/>
      <put name="navbar"    value="/article/common/navbar.jsp"/>
   </definition>
   <definition name=".article.Result" extends=".article.Base">
      <put name="title"     value="article.Result.title"/>
      <put name="content"   value="/article/content/result.jsp"/>
   </definition>
   <definition name=".article.View" extends=".article.Base">
      <put name="title"     value="article.View.title"/>
      <put name="content"   value="/article/content/view.jsp"/>
   </definition>
   <definition name=".article.Form" extends=".article.Base">
      <put name="title"     value="article.Form.title"/>
      <put name="header"    value="/article/common/headerForm.jsp"/>
      <put name="content"   value="/article/content/form.jsp"/>
   </definition>
   <definition name=".article.Menu" extends=".article.Base">
      <put name="title"     value="article.Menu.title"/>
      <put name="content"   value="/article/content/menu.jsp"/>
      <put name="navbar"    value="/article/common/navbarMenu.jsp"/>
   </definition>
</tiles-definitions>

and the Article.jsp looks like:

I have no problem for web pages to pick up and show "header", "content", "navbar". And I have the following:

saved in my C:\...\ApplicationName\WEB-INF\classes\resources\application.properties file. But, my web pages simply cannot pick up and show "title". Do you spot the problem in my code?

Using <tiles:getAsString name="title"/> instead of <tiles:get name="title"/>.

Using <tiles:getAsString name="title"/> instead of <tiles:get name="title"/>.

I concur.