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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoPlainText><span lang=EN-US>Meeting: 10:00 Tuesday (Washington DC time), 1500 UK time, 1600 Paris time.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US>If you do not receive a notification from Skype then please join it by clicking the link:<o:p></o:p></span></p><p class=MsoPlainText><a href="https://join.skype.com/ykyu5SIPhSnD"><span lang=EN-US>https://join.skype.com/ykyu5SIPhSnD</span></a><span lang=EN-US><o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US>*Don't have Skype yet? Download it before you join </span><a href="https://www.skype.com"><span lang=EN-US>https://www.skype.com</span></a><span lang=EN-US><o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:16.0pt'>Draft agenda:<o:p></o:p></span></b></p><ol style='margin-top:0cm' start=1 type=1><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo3'>Project plan updates for CWE<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo3'>OAIS-IF – NOTE that Steve is having some days off so he may not be able to make the meeting<o:p></o:p></li><ol style='margin-top:0cm' start=1 type=a><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level2 lfo3'>Details from last week: <o:p></o:p></li></ol></ol><p class=MsoListParagraph style='margin-left:108.0pt;text-indent:-108.0pt;mso-text-indent-alt:-9.0pt;mso-list:l0 level3 lfo3'><![if !supportLists]><span style='mso-list:Ignore'><span style='font:7.0pt "Times New Roman"'> </span>i.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Interactions – from Steve - <a href="https://www.dropbox.com/s/dnftuks5nvixdl0/Interactions_210608.jpg?dl=0">https://www.dropbox.com/s/dnftuks5nvixdl0/Interactions_210608.jpg?dl=0</a><o:p></o:p></p><p class=MsoListParagraph style='margin-left:108.0pt;text-indent:-108.0pt;mso-text-indent-alt:-9.0pt;mso-list:l0 level3 lfo3'><![if !supportLists]><span style='mso-list:Ignore'><span style='font:7.0pt "Times New Roman"'> </span>ii.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Detailed suggestions from Mike - <a href="https://www.dropbox.com/s/aw8yra2cpnd3op1/Draft%20Interaction%20Patterns%20for%20discussion-MK-20210608.pptx?dl=0">https://www.dropbox.com/s/aw8yra2cpnd3op1/Draft%20Interaction%20Patterns%20for%20discussion-MK-20210608.pptx?dl=0</a><o:p></o:p></p><p class=MsoNormal style='margin-left:108.0pt'>I (David) took an action last week to try to re-draw Mike’s PPT to fit in with the GB. However the basic incompatibilities made this pretty well impossible.<o:p></o:p></p><p class=MsoNormal style='margin-left:108.0pt'>Yet there were many good ideas in Mike’s diagrams and they made me re-think the sequence diagram that I put together quite a while ago.<o:p></o:p></p><p class=MsoNormal style='margin-left:108.0pt'>A number of questions keep coming up:<o:p></o:p></p><ul style='margin-top:0cm' type=disc><li class=MsoListParagraph style='margin-left:90.0pt;mso-list:l3 level1 lfo6'>How to consumers/archives/info sources discover how to talk to each other?<o:p></o:p></li><li class=MsoListParagraph style='margin-left:90.0pt;mso-list:l3 level1 lfo6'>What are the functions of an adapter?<o:p></o:p></li><li class=MsoListParagraph style='margin-left:90.0pt;mso-list:l3 level1 lfo6'>Are there generic aspects to an adapter?<o:p></o:p></li></ul><p class=MsoNormal style='margin-left:108.0pt'>The new sequence diagram attached tries to provide some answers.<o:p></o:p></p><ul style='margin-top:0cm' type=disc><li class=MsoListParagraph style='margin-left:90.0pt;mso-list:l2 level1 lfo7'>The adapters are tailored to the each end of the interactions (InfoRequester and InfoSource), which have Adapter and Adapter2 respectively. These only need to be installed once<o:p></o:p></li><li class=MsoListParagraph style='margin-left:90.0pt;mso-list:l2 level1 lfo7'>I propose a way for the adapters discover how to communicate with the other side via, in this case, something I called a “switchboard”. “Switchboard” knows that Adapter2 can use say, HTTP (port 80 or 6789), or CORBA or…. This allows Adapter to find out how to talk to Adapter2. <o:p></o:p></li></ul><p class=MsoListParagraph style='margin-left:126.0pt'>NOTE that I am not talking about searching for objects. The assumption is that somehow – not specified here – the InfoRequester discovers that it may be able to get some info it wants from InfoSource.<o:p></o:p></p><ul style='margin-top:0cm' type=disc><li class=MsoListParagraph style='margin-left:90.0pt;mso-list:l2 level1 lfo7'>The sequence diagram shows some interactions. Some of these are specific e.g. “checkUsability()”, which is closely tied to the design of InfoRequester. On the other hand there are aspects which could be pretty generic such as “requestPackage” and “requestRepInfoIDs”. Another generic part is knowing how to contact the “Switchboard” and initiate the communications.<o:p></o:p></li><li class=MsoListParagraph style='margin-left:90.0pt;mso-list:l2 level1 lfo7'>It seems to me that with a bit more analysis we could made some clear interfaces between the specific part of the adapter and some generic parts of the adapter. This would make implementations much easier.<o:p></o:p></li></ul><p class=MsoListParagraph style='margin-left:108.0pt;text-indent:-108.0pt;mso-text-indent-alt:-9.0pt;mso-list:l0 level3 lfo3'><![if !supportLists]><span style='mso-list:Ignore'><span style='font:7.0pt "Times New Roman"'> </span>iii.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>WHITE BOOK FROM Steve - <a href="https://www.dropbox.com/s/fdd8ec5cq2y574z/02_White_Book_Recommended_Standard_OAIS-IF_Draft_191216%20v5.3%2006_ComparedCombined_04_05_210524.docx?dl=0">https://www.dropbox.com/s/fdd8ec5cq2y574z/02_White_Book_Recommended_Standard_OAIS-IF_Draft_191216%20v5.3%2006_ComparedCombined_04_05_210524.docx?dl=0</a><o:p></o:p></p><p class=MsoListParagraph style='margin-left:108.0pt;text-indent:-108.0pt;mso-text-indent-alt:-9.0pt;mso-list:l0 level3 lfo3'><![if !supportLists]><span style='mso-list:Ignore'><span style='font:7.0pt "Times New Roman"'> </span>iv.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Component diagram from Steve - <a href="https://www.dropbox.com/s/5fsdmfcchzcqpz5/Component_Diagram_210601.jpg?dl=0">https://www.dropbox.com/s/5fsdmfcchzcqpz5/Component_Diagram_210601.jpg?dl=0</a><o:p></o:p></p><ol style='margin-top:0cm' start=2 type=1><ol style='margin-top:0cm' start=2 type=a><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level2 lfo3'>Steve may sent out updated document/diagram<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level2 lfo3'><span lang=EN-US>The last version of the draft GB is <a href="https://www.dropbox.com/s/k7s1s7xh9tt01wt/OAIS-IF%20Rationale%20Scenarios%20and%20Requirements-20210516.docx?dl=0">https://www.dropbox.com/s/k7s1s7xh9tt01wt/OAIS-IF%20Rationale%20Scenarios%20and%20Requirements-20210516.docx?dl=0</a> – this includes my thoughts on sequence diagrams, messages, etc.</span><o:p></o:p></li></ol></ol><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Regards<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>..David<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>