关于aspnetforums的问题

Question

default.aspx页就没有看懂,谁能给讲讲
<%@ Page Language="C#" %>
<%@ Import Namespace="AspNetForums.Components" %>
<%@ Register TagPrefix="Forums" Namespace="AspNetForums.Controls" Assembly="AspNetForums.Controls" %>
<%@ Register TagPrefix="mp" Namespace="MetaBuilders.WebControls.MasterPages" Assembly="MetaBuilders.WebControls.MasterPages" %><mp:ContentContainer runat="server" id="MPContainer" MasterPageFile="~/Themes/MasterPage.ascx">
<mp:Content id="HeadTag" runat="server">
<meta http-equiv="Refresh" content="300" />
</mp:Content><mp:Content id="MainContent" runat="server">
<Forums:ForumGroupView runat="server" />
</mp:Content>
</mp:ContentContainer>
这里的mp和forums你怎么回事啊