From mboxrd@z Thu Jan  1 00:00:00 1970
From: Max Mikhanosha <max@openchat.com>
Subject: Re: Organizing by time or by subject and an idea
Date: Sat, 21 Jan 2012 08:09:30 -0500
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At Sat, 21 Jan 2012 07:59:38 -0500,
Max Mikhanosha wrote:

> If you do this "copy the project" thing once a week or so, you can
> have a nice ediff of the project's progress along the time-line.
> 
> Actually it may not be a bad idea to implement M-x
> org-ediff-subtree-with-sibling command, that would do that
> automatically, and would include the ediff hooks to do fold/reveal of
> regions

Expanding on that thought, if one were to write a contrib module to do
this type of stuff, maybe each time you want to make revision of a
project, you make a copy of it, and archive the old one. This way all
searches only find the most recent stuff. And then have M-x
org-ediff-subtree-with-archive command, which accepts numeric argument
being the N'th copy of the archived tree?