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Re: [urn] PWID as citation (was: Suggested PWID URN for Persistent Web IDentifiers - version 3)

Eld Zierau <elzi@kb.dk> Mon, 10 September 2018 13:44 UTC

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From: Eld Zierau <elzi@kb.dk>
To: "Dale R. Worley" <worley@ariadne.com>, "urn@ietf.org" <urn@ietf.org>
Thread-Topic: PWID as citation (was: Suggested PWID URN for Persistent Web IDentifiers - version 3)
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Date: Mon, 10 Sep 2018 13:44:03 +0000
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Subject: Re: [urn] PWID as citation (was: Suggested PWID URN for Persistent Web IDentifiers - version 3)
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Please be aware that I will answer this later - but due to a very busy period (workwise, in connection with the iPRES conference and having one weeks holiday) I may not be able to get time to answer before after iPRES - that means in start of October
Best regards, Eld

-----Original Message-----
From: Dale R. Worley <worley@ariadne.com> 
Sent: Sunday, September 9, 2018 4:27 AM
To: Eld Zierau <elzi@kb.dk>; urn@ietf.org
Subject: PWID as citation (was: Suggested PWID URN for Persistent Web IDentifiers - version 3)

Thinking again about PWIDs as citations ...

One feature of a citation is that it's not just an identifier for retrieving a specific instance of a resource.  If that instance is unavailable, information can be extracted from the citation that can be used to retrieve other instances of the resource.  I.e., if the cited instance is in Library A, information from the citation (author, title,
etc.) can be used to locate another instance in Library B.  The citation is *transparent* as a source of information for *partial matching* against the universe of information resources.

>From this point of view, retrieval URLs for web archives are *opaque*, at least, unless one knows the specifics of how each archive constructs its URLs.

But PWID URNs are *transparent*; the archived URL and timestamp can be extracted from the URN algorithmicly.  And those can be used to search other web archives for similar archived resources.  (Presumably, other archives don't have archived resources with exactly the same
timestamps.)

Conversely, if the archives are amenable, we can have straightforward resolution by having each archive register a URL prefix with IANA.  Like the current DOI resolver, when a URN is prefixed with its archive's URL prefix and then fetched, the referenced resource is returned.

And I think this combination of features is something new -- PWIDs could be *algorithmicly resolvable* (using their specified archives), and yet also be *citations* (transparently providing enough information that a human can find similar resources in other archives).

Dale

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