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Atom Model - feed vs. entry
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AAschen  
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 More options Jun 13, 5:43 am
From: AAschen <aschenbren...@sub.uni-goettingen.de>
Date: Fri, 12 Jun 2009 12:43:46 -0700 (PDT)
Local: Sat, Jun 13 2009 5:43 am
Subject: Atom Model - feed vs. entry
Dear all,

I've only just come to appreciate OAI-ORE - thanks a lot for a great
format!
Even though I'm a newbie, I thought I'd post one of my thoughts here.
Maybe it helps explaining ORE in future tutorials, etc.

In short: in ORE Atom, the approach of pushing each Resource Map into
an Atom <entry> element seemed unintuitive to me at first.

Why is that?, What is my background?
Rather than publication repositories, we are working with research
data (digitised books, transcriptions). This means that
a) the research data is versioned with a varying rate of about one new
version per week.
b) I'd like to model both datastreams and behaviors (i.e. re-
representation services) as ORE Resources, which means that we can end
up with quite a number of Resouces and their metadata. For example, an
object containing a digitised image (80 megs) offers a thumbnail image
(500k) - the user does not care whether the thumbnail is stored as a
separate datastream or whether it is created on the fly by a behavior,
so it is exposed as a Resource.

With such rather large objects, pushing Resource Maps into a single
Atom entry element can become dense. Also, the environment consists of
multiple federated repositories, so an individual repository is not as
important as (1) the individual object and (2) cross-repository
collections.

With that background, it would be more intuitive to me, to model
* each Resource as an individual <entry> element,
* each Resource Map as an individual Atom feed (that grows over time
as new versions are added),
* for each collection there is a Sitemap (http://sitemaps.org/) that
indexes all the Atom feeds of its objects.

Ok, this is just a thought experiment. Also, you may argue that we
should decompose and work with smaller objects. Granted, there are
arguments both ways. - But maybe the thought experiment helps in
better connecting to people with such a background.

best wishes,
Andi


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Herbert Van de Sompel  
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 More options Jun 13, 6:01 am
From: Herbert Van de Sompel <hvds...@gmail.com>
Date: Fri, 12 Jun 2009 14:01:43 -0600
Local: Sat, Jun 13 2009 6:01 am
Subject: Re: Atom Model - feed vs. entry

Dear Andi,

this was quite extensively discussed during the standardization  
process. see http://www.openarchives.org/ore/documents/atom_revision_20080801.html

cheers

herbert

On Jun 12, 2009, at 1:43 PM, AAschen wrote:

==
Herbert Van de Sompel
hvds...@gmail.com

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