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From: "Stephen J. Turnbull" <stephen@xemacs.org>
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Subject: Re: plist-based package.el (was Re: cl-defstruct-based package.el,
	now with ert tests and no external tar!)
Date: Thu, 06 Jun 2013 18:30:11 +0900
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Ted Zlatanov writes:

 > plists as a sequence of odd=key and even=value don't actually associate
 > the key with the value, unlike hashtables and alists.

They do if you use plist-put and plist-get.  If you use list
primitives, you get what you deserve, which may not always be what you
want....