asp.net literal label

Literal和Label到底有什么区别,其实它们也只有一个区别,就是在转换成客户端Html代码后,Label就成了<span></span>,而Literal则是什么标记都不带
++++++++++++++++++++++++++++++

<OBJECT height=288 width=384 classid=clsid:cfcdaa03-8be4-11cf-b84b-0020afbbccfa VIEWASTEXT>
<PARAM NAME="_ExtentX" VALUE="10160">
<PARAM NAME="_ExtentY" VALUE="7620">
<PARAM NAME="AUTOSTART" VALUE="-1">
<PARAM NAME="SHUFFLE" VALUE="0">
<PARAM NAME="PREFETCH" VALUE="0">
<PARAM NAME="NOLABELS" VALUE="0">
<PARAM NAME="SRC" VALUE="<asp:Literal id='lt_src' runat='server'></asp:Literal>">
<PARAM NAME="CONTROLS" VALUE="imagewindow">
<PARAM NAME="CONSOLE" VALUE="clip1">
<PARAM NAME="LOOP" VALUE="0">
<PARAM NAME="NUMLOOP" VALUE="0">
<PARAM NAME="CENTER" VALUE="0">
<PARAM NAME="MAINTAINASPECT" VALUE="0">
<PARAM NAME="BACKGROUNDCOLOR" VALUE="#000000">
</OBJECT>

+++++++++++++++++++++++++++++++++