[Prophesy] Background material - xdelta

[Daniel Phillips]

Having roughed out the design of a storage engine for Prophesy, I thought I'd 
do a little research and I found this:

   http://telia.dl.sourceforge.net/sourceforge/xdelta/xdfs.pdf
   (Josh MacDonald's paper on delta compression)

Recommended reading.  And see:

   http://prcs.sourceforge.net/
   (PRCS revision control project, home page)

   http://telia.dl.sourceforge.net/sourceforge/prcs/prcs_doc.html
   (PRCS documentation)

Though much of what is written here seems similar to what I've mapped out, in 
the end, the implementation comes out very different.

-- 
Daniel