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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Dear Nestor and Mario,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">As requested, Roger Thompson and I have completed our in-depth analysis of the proposed DAI conceptual archive architecture. The results of that analysis are in the attached presentation.
These materials have also been reviewed with the rest of the members of the SEA SAWG that has been working on the MOIMS and SOIS application and support architecture and it has their concurrence.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">The short summary of our analysis is that we think that there is potential merit in developing some sort of common archive architecture, but that it is in need of a lot more work, even
at a conceptual level, before it should be allowed to proceed. There are many technical issues identified in the analysis. There are also a number of practical issues relating to the breadth of scope, the nature of the approach that is implied, and the implications
of these on being able to develop a viable set of standards. We also find that they have not taken into consideration relevant prior work in both MOIMS and SEA that should be considered.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Please let us know how you wish to proceed. Do you want to have a CESG discussion of this, as would be usual for a WG charter change, or do you intend to pass this analysis directly back
to the CMC?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Best regards, Peter and Roger<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><b><span style="font-family:Calibri;color:black">From:
</span></b><span style="font-family:Calibri;color:black">Nestor Peccia <Nestor.Peccia@esa.int><br>
<b>Date: </b>Thursday, April 6, 2017 at 7:12 AM<br>
<b>To: </b>Peter Shames <peter.m.shames@jpl.nasa.gov>, Roger Thompson <roger.rocketbrain@btinternet.com><br>
<b>Subject: </b>Opinion on DAI WG Architecture<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
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<span style="font-size:10.0pt;font-family:"sans-serif","serif"">Dear both</span> <br>
<br>
<span style="font-size:10.0pt;font-family:"sans-serif","serif"">The DAI WG report to the CMC asks them to issue a resolution recognizing that the DAI notional architecture is a good basis for planning their future work in the digital archive arena</span>
<br>
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<span style="font-size:10.0pt;font-family:"sans-serif","serif"">As CESG Chair, I have asked the CMC to keep on hold the resolution until the CESG evaluates the architecture.(see below and attachments)</span>
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<span style="font-size:10.0pt;font-family:"sans-serif","serif"">Considering that your are working on the MOIMS difefrent views inclusing archiving, I would appreciate your comments.</span>
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<img width="597" height="379" id="_x0000_i1025" src="cid:image001.png@01D2BA87.39808140"><br>
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<img width="597" height="329" id="_x0000_i1026" src="cid:image002.png@01D2BA87.39808140"><br>
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<span style="font-size:10.0pt;font-family:"sans-serif","serif"">ciao</span> <br>
<span style="font-size:10.0pt;font-family:"sans-serif","serif"">nestor</span> <o:p>
</o:p></p>
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