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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Hi Steve<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>One comment is that you have lots of classes and their sub-classes, but I would suggest all or most should be interfaces at this stage. <o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>A class can only extend one other class. On the other hand an interface can extend many other interfaces, which gives more flexibility to break down functionality, and allows clarity when, for example, using a delegation pattern. <o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Regards<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>..David<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> MOIMS-DAI <moims-dai-bounces@mailman.ccsds.org> <b>On Behalf Of </b>Hughes, John S (US 398B) via MOIMS-DAI<br><b>Sent:</b> 21 April 2020 05:08<br><b>To:</b> MOIMS-Data Archive Interoperability <moims-dai@mailman.ccsds.org><br><b>Cc:</b> Hughes, John S (US 398B) <john.s.hughes@jpl.nasa.gov><br><b>Subject:</b> Re: [Moims-dai] OAIS-IF UML Class and Interface DIagram<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Sorry, the messages were in a different diagram. Both are now attached.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> MOIMS-DAI <<a href="mailto:moims-dai-bounces@mailman.ccsds.org">moims-dai-bounces@mailman.ccsds.org</a>> <b>On Behalf Of </b>Hughes, John S (US 398B) via MOIMS-DAI<br><b>Sent:</b> Monday, April 20, 2020 9:03 PM<br><b>To:</b> MOIMS-Data Archive Interoperability <<a href="mailto:moims-dai@mailman.ccsds.org">moims-dai@mailman.ccsds.org</a>><br><b>Cc:</b> Hughes, John S (US 398B) <<a href="mailto:john.s.hughes@jpl.nasa.gov">john.s.hughes@jpl.nasa.gov</a>><br><b>Subject:</b> [EXTERNAL] Re: [Moims-dai] OAIS-IF UML Class and Interface DIagram<o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Hi all,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Attached is the latest diagram with fixes for the issues identified at our last meeting. One item for discussion could be the harmonization of the two sets of messages, David’s and those in this diagram.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Steve<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p></div></body></html>