源代码文件注释读不懂

"Alex Cheng" <[email protected]> Wed, 7 Feb 2007 00:33:11 +0800
Newsgroups gmane.comp.web.zope.chinese
Message-ID <[email protected]>
大家好, 小弟今天看了External File 的源代码, 可是就是看不懂注释.
"""
$RCSfile: CreationDialog.py,v $
......
......
"""
[这个$符号是什么意思啊? 感觉怪怪的. ]

还有这一段:
Author: <a href="mailto:[email protected]">Craeg Strong</a>
Release: 1.0
[为什么作者要把自己的名字写在超链接中, 像个网页似的]


__cvstag__  = '$Name:  $'[6:-2]
__date__    = '$Date: 2002/05/26 03:36:17 $'[6:-2]
__version__ = '$Revision: 1.3 $'[10:-2]

[这三句话也怪怪的]

谢谢指教.:)

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