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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hi Lisa<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I find that it is always helpful to put yourself in the shoes of
someone who wants to harvest your data. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If the smallest record count that can be obtained from your
system as the result of an initial OAI ListRecords request (including dates
and/or sets) is very large, it can be quite difficult for harvesting systems to
successfully complete an ‘initial population’ from your data
without other influences (network connectivity, target response time,
resumption token lifetime etc.) having an increasing bearing on the successful
outcome of the harvest. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>For example, having a repository containing 200,000 records, all
dated the same day and not supporting a request granularity of less than 1 day
makes initial population more difficult for any harvesting system </span><span
style='font-size:11.0pt;font-family:Wingdings;color:#1F497D'>J</span><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I do not know how many records you have so this may not be an
issue for you but I think it is worth bearing in mind. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Cheers<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Rob<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'>
oai-implementers-bounces@openarchives.org
[mailto:oai-implementers-bounces@openarchives.org] <b>On Behalf Of </b>Frederic
MERCEUR<br>
<b>Sent:</b> 11 April 2008 07:41<br>
<b>To:</b> lisa@issuelab.com<br>
<b>Cc:</b> oai-implementers@openarchives.org<br>
<b>Subject:</b> Re: [OAI-implementers] Using dates other than metadata record
creation date for data provider "from" and "until" searches<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>Hello,</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-GB style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>As far
as I understand the OAI protocol, I would rather say that DateStamp is about
the last time that your record has been updated (which then must reflect
"create", "update" or "delete"). </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-GB style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>When
you will first register your archive into a Harvester, I guess the harvester
will first get all records available. To do so, it will query your archive
without the "from" and "to" parameter. </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-GB style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>Then,
most of harvesters will run regularly some incremental harvesting to get the
records modified, deleted or added since the previous harvest. To do so they
will run the query with the "from" parameter.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-GB style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>Kind
regards,</span><br>
<span lang=EN-GB style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>Fred</span><o:p></o:p></p>
<p class=MsoNormal><br>
<br>
Lisa M. Brooks a écrit : <o:p></o:p></p>
<p class=MsoNormal>Hello - We're very close to launching our data provider.
Before we do I have a question about date-stamps.<br>
<br>
I understand that the "from" and "until" dates used to
request metadata records refer to the date that the metadata record was
created. We are an archive of research works that date back to the 1980s (we
will definitely get even older works into our archive as we move forward). To
my mind it would be more helpful to folks if our record date-stamps reflect the
date the research work in question was first published.<br>
<br>
My concern is that we introduce our repository and harvesters don't get the
gist of the temporal scope of our collection because everything is date-stamped
en masse with the date that we generate our metadata records (which, with luck,
will be this Saturday).<br>
<br>
I hope I'm making sense! Just want to know if this is a big no-no, or if there
are things to consider before doing something like this. Appreciate the insight
of list participants.<br>
<br>
Thanks for reading -<br>
~Lisa<br>
<br>
Lisa M. Brooks<br>
IssueLab - bringing nonprofit research into focus<br>
<a href="mailto:lisa@issuelab.org">lisa@issuelab.org</a><br>
773-649-1790<br>
<a href="http://www.issuelab.org">http://www.issuelab.org</a><br>
<br>
<o:p></o:p></p>
<pre><o:p> </o:p></pre><pre style='text-align:center'>
<hr size=4 width="90%" align=center>
</pre><pre><o:p> </o:p></pre><pre>_______________________________________________<o:p></o:p></pre><pre>OAI-implementers mailing list<o:p></o:p></pre><pre>List information, archives, preferences and to unsubscribe:<o:p></o:p></pre><pre><a
href="http://www.openarchives.org/mailman/listinfo/oai-implementers">http://www.openarchives.org/mailman/listinfo/oai-implementers</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre> <o:p></o:p></pre>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<p class=MsoNormal>-- <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Fred Merceur<br>
Ifremer / Bibliothèque La Pérouse<br>
<a href="mailto:frederic.merceur@ifremer.fr">frederic.merceur@ifremer.fr</a><br>
Tél : 02-98-49-88-69<br>
Fax : 02-98-49-88-84<br>
<a href="http://www.ifremer.fr/blp/">Bibliothèque La Pérouse</a><br>
<a href="http://www.ifremer.fr/docelec/">Archimer, Ifremer's Institutional
Repository</a><br>
<a href="http://www.ifremer.fr/avano/">Avano, a marine and aquatic OAI
harvester</a><br>
<br>
<b>Avant d'imprimer, pensez à l'environnement!</b> </span><o:p></o:p></p>
</div>
<p class=MsoNormal><span style='color:windowtext'><o:p> </o:p></span></p>
<p><span style='font-size:10.0pt;color:windowtext'>No virus found in this
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