# Re: Registrar

Larry Masinter (masinter@parc.xerox.com)
Wed, 14 Jul 1993 10:28:06 PDT

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    To: krol@ux1.cso.uiuc.edu

    In-Reply-To: krol@ux1.cso.uiuc.edu's message of Wed, 14 Jul 1993 09:25:41 -0700 <93Jul14.092557pdt.2797@golden.parc.xerox.com>

    Subject: Re: Registrar

    From: Larry Masinter <masinter@parc.xerox.com>

    Message-Id: <93Jul14.102809pdt.2791@golden.parc.xerox.com>

    Date: 	Wed, 14 Jul 1993 10:28:06 PDT

It may be that you can't get away with having one kind of URN. Why not
have both 'mutable' URNs and 'immutable' ones?

The mutuable ones refer to 'the latest version of this thing, as
determined by the author', while the 'immutable one' refers to 'this
is as good as if I had put away a copy'.

When you assign a URN, assign two. When you update it, the update
keeps the mutable URN and gets a new immutable URN.

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