# Re: URN namespace

Larry Masinter (masinter@parc.xerox.com)
Wed, 16 Aug 1995 15:45:25 PDT

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    To: uri@bunyip.com

    In-Reply-To: mshapiro@ncsa.uiuc.edu's message of Wed, 16 Aug 1995 13:56:16 -0700 <95Aug16.135626pdt.2766@golden.parc.xerox.com>

    Subject: Re: URN namespace

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

    Message-Id: <95Aug16.154538pdt.2763@golden.parc.xerox.com>

    Date: Wed, 16 Aug 1995 15:45:25 PDT

Any naming system that uses current DNS domains and expects long term
persistence also requires at least a low-frequency time stamp, because
current DNS domains are not guaranteed long term persistence.

I think 'year' is good enough, but 'year and month' might be better.

1993 xerox.com documentID

Note punctuation elided. If year=currentyear, use DNS, otherwise use
some other service.

> Does ease (or difficulty) of creating and extending the name space
> affect persistence? If it is easy to create a naming authority, will
. this work against persistence?

I think the key element isn't 'ease of creating' but 'frequency of
reassignment'. We should all have heard of the cases of 'mtv.com' and
'kaplan.com' and 'bbb.com' already, right?

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