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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>This email contains some answers to a selection of Peter Shame’s comments on </span><span style='color:#1F497D'>876x0 </span><span style='color:#1F497D'> that won’t otherwise be straightforwardly addressed by this round of document updates.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:black'>PS: I’m guessing that the rationale for this will become evident, but I am having trouble understanding, on the surface of it, why any part of the DAS or DVS SERVICES would appear INSIDE a DEVICE element. Aren’t these external services that are at least one (or two) levels of indirection separate from the device itself and how it works.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>This is a fair enough conceptual point; the intent is that the DAS and DVS <i>components</i> specified in the datasheet are used in the specification (and typically, auto-generated implementation) of the parts of the DAS and DVS <i>services</i> that correspond to that device.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>This is probably best summarised by section 3.2 and 3.3 of the Green Book (<a href="http://cwe.ccsds.org/sois/docs/SOIS-APP/Meeting%20Materials/2015/Spring/EDS/TBDx0g1_EDS_and_Common_DoT.2015.03.01.docx">http://cwe.ccsds.org/sois/docs/SOIS-APP/Meeting%20Materials/2015/Spring/EDS/TBDx0g1_EDS_and_Common_DoT.2015.03.01.docx</a>):<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>There is an intent to change the schema in this area, so that instead of flagging a <i>component</i> as suitable for use in DAS/DVS, you instead flag an <i>interface</i> as access, functional or message. Then what you would expect is that, for example, the DAS service for a particular satellite aggregates together all interfaces flagged as ‘access’ across all device datasheets.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>But that is associated with the changes to fully support MTS, and so not in this version of the schema red book.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:black'>PS: Does this really mean that EDS does not support any subnetwork other than SpaceWire? Seems like an over constrained spec.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>That is the current status quo – there are plans to:<o:p></o:p></span></p><p class=MsoListParagraph style='margin-left:38.5pt;text-indent:-18.0pt;mso-list:l2 level1 lfo5'><![if !supportLists]><span style='font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:#1F497D'>‘move’ this part of the schema to the DoT, so that it is user-extensible with other subnetwork types<o:p></o:p></span></p><p class=MsoListParagraph style='margin-left:38.5pt;text-indent:-18.0pt;mso-list:l2 level1 lfo5'><![if !supportLists]><span style='font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:#1F497D'>Add standard terms for (at least) MILBUS subnetworks<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Again, that is future work, not in the scope of this document version. <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:black'>PS: What is a “hierarchical set of CONSTANT data values”? And why is this the only metadata element allowed?<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>The metadata area is a tree-like structure of named values. They represent arbitrary facts known about the device (e.g. it’s version, size, etc). There are no current known requirements for any form of metadata that doesn’t fit into that pattern.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:black'>PS: Reference CCSDS namespace as registered in SANA.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>A ‘namespace’ within a datasheet is just a partition local to that datasheet, analogous to a C++ namespace or Java package. It is not anything intended to have any wider universal visibility; in particular it is _<i>not</i>_ an XML/XSD namespace.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Possibly it could be renamed to ‘package’ to avoid that confusion, but there are no current plans to actually do so.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>richard<o:p></o:p></span></p><p class=MsoNormal><span style='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 lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:EN-GB'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:EN-GB'> Shames, Peter M (312B) [mailto:peter.m.shames@jpl.nasa.gov] <br><b>Sent:</b> 01 May 2015 18:39<br><b>To:</b> Richard Melvin<br><b>Cc:</b> r.krosley@andropogon.org; jonathan.j.wilmot@nasa.gov<br><b>Subject:</b> Re: Plan for update to SEDS schema Red book (876x0 )<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Ok. Thanks for the info.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I knew there were WG changes, but was not sure who the doc or WG leads were. Sounds like you're doing just what is needed. Good to know.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Let me know if you need anything else.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Peter<o:p></o:p></p></div><div><p class=MsoNormal><br><br>Sent from Peter's iPhone 6 <o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Everything should be made as simple as possible, <o:p></o:p></p></div><div><p class=MsoNormal>but not simpler. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>~Albert Einstein<o:p></o:p></p></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><br>On May 1, 2015, at 10:12 AM, Richard Melvin <<a href="mailto:Richard.Melvin@scisys.co.uk">Richard.Melvin@scisys.co.uk</a>> wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal><span style='color:#1F497D'>Thank you for your time in supporting this activity. It comes from the results of the CESG poll, where Tom Gannet advised ‘Resolution of the conditions should be negotiated directly with the authors of the conditions (CCed) and reported back to the CESG’</span>. <span style='color:#1F497D'>Hopefully this ‘negotiation’ should take less effort than a full cycle of raising + resolving adiditonal RIDs.</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>To be clear, I am updating 876x0 (the schema book), in coordination with Ray, who is the editor for 876x1 (the terms book), and Jonathan, the WG chair. Certainly I have no objection to these emails being copied to anyone else they are relevant to.</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>Thanks,</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'>richard</span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:#1F497D'> </span><o:p></o:p></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:EN-GB'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:EN-GB'> Shames, Peter M (312B) [<a href="mailto:peter.m.shames@jpl.nasa.gov">mailto:peter.m.shames@jpl.nasa.gov</a>] <br><b>Sent:</b> 30 April 2015 18:58<br><b>To:</b> Richard Melvin<br><b>Cc:</b> <a href="mailto:r.krosley@andropogon.org">r.krosley@andropogon.org</a>; <a href="mailto:jonathan.j.wilmot@nasa.gov">jonathan.j.wilmot@nasa.gov</a><br><b>Subject:</b> Re: Plan for update to SEDS schema Red book (876x0 )<br><b>Importance:</b> High</span><o:p></o:p></p></div></div><p class=MsoNormal> <o:p></o:p></p><div><p class=MsoNormal><span style='font-size:10.5pt;color:black'>Richard, et al,</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;color:black'> </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;color:black'>It occurs to me that good "CCSDS etiquette" would include the editors of <b><i>both</i></b> documents, the WG chair, and possibly even the new AD in this discussion. Since two separate editors appear to be involved, and sorting this out completely is therefore a WG matter, I think that broader discussion would be a good thing. Further, since the AD is also new to the job, I think that keeping him in the loop would also be useful. That way everyone gets to buy in and also gets to see the "CCSDS machinery" in motion.</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;color:black'> </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;color:black'>If you agree you can copy them on the previous email trail or I can do it for you. What would you prefer?</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;color:black'> </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;color:black'>Thanks, Peter</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;color:black'> </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;color:black'> </span><o:p></o:p></p></div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='color:black'>From: </span></b><span style='color:black'>Richard Melvin <<a href="mailto:Richard.Melvin@scisys.co.uk">Richard.Melvin@scisys.co.uk</a>><br><b>Date: </b>Thursday, April 30, 2015 at 6:38 AM<br><b>To: </b>Peter Shames <<a href="mailto:peter.m.shames@jpl.nasa.gov">peter.m.shames@jpl.nasa.gov</a>><br><b>Cc: </b>Ramon Krosley <<a href="mailto:r.krosley@andropogon.org">r.krosley@andropogon.org</a>>, "<a href="mailto:jonathan.j.wilmot@nasa.gov">jonathan.j.wilmot@nasa.gov</a>" <<a href="mailto:jonathan.j.wilmot@nasa.gov">jonathan.j.wilmot@nasa.gov</a>><br><b>Subject: </b>Plan for update to SEDS schema Red book (876x0 )</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;color:black'> </span><o:p></o:p></p></div><blockquote style='border:none;border-left:solid #B5C4DF 4.5pt;padding:0cm 0cm 0cm 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt' id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE"><div><div><p class=MsoNormal><span style='color:black'>To try and reduce the likelihood of multiple rounds of rework, I thought I’d share my plan for responding to your CESG review comments. I’m new to the process of publishing CCSDS documents, so let me know if there is anything that jumps out at you as likely to be problematic.</span><o:p></o:p></p><p class=MsoNormal><span style='color:black'> </span><o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l1 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:black'>Various parts of section 1, and sections 2.1, 2.2 and 2.4, will be updated to be largely in common between the two documents (i.e. 876x0 and 876x1)</span><o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l1 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:black'>The diagram shown below will be included and explained at the start of both documents to show the relation of the scope of the concepts they cover.</span><o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l1 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:black'>Section 2.5, ‘principles of an Electronic Data sheet’, which currently attempts to provide a rather-too-brief overview of the all the concepts covered in the schema, will be deleted as redundant with:</span><o:p></o:p></p><p class=MsoListParagraph style='margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1 level2 lfo2'><![if !supportLists]><span style='mso-list:Ignore'>a.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]><span style='color:black'>The schema Green book, which explains everything in more detail, with diagrams.</span><o:p></o:p></p><p class=MsoListParagraph style='margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1 level2 lfo2'><![if !supportLists]><span style='mso-list:Ignore'>b.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]><span style='color:black'>The terms defined in section 1.5</span><o:p></o:p></p><p class=MsoListParagraph style='margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1 level2 lfo2'><![if !supportLists]><span style='mso-list:Ignore'>c.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]><span style='color:black'>The body of the document (section 3).</span><o:p></o:p></p><p class=MsoNormal><span style='color:black'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:black'>Within next 2 weeks I’ll produce, and sent to you directly, a version of the document with:</span><o:p></o:p></p><p class=MsoListParagraph style='margin-left:38.5pt;text-indent:-18.0pt;mso-list:l0 level1 lfo4'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:black'>all the above structural changes</span><o:p></o:p></p><p class=MsoListParagraph style='margin-left:38.5pt;text-indent:-18.0pt;mso-list:l0 level1 lfo4'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:black'>all of your comments not made moot by the above addressed</span><o:p></o:p></p><p class=MsoListParagraph style='margin-left:38.5pt;text-indent:-18.0pt;mso-list:l0 level1 lfo4'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:black'>bitmap graphics replaced by vectors</span><o:p></o:p></p><p class=MsoListParagraph style='margin-left:38.5pt;text-indent:-18.0pt;mso-list:l0 level1 lfo4'><![if !supportLists]><span style='font-family:Symbol'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='color:black'>no new row to the document control table (stays at ‘current draft’, date updates).</span><o:p></o:p></p><p class=MsoNormal><span style='color:black'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:black'>Assuming you ok that update, I will move onto addressing the points raised by Keith Scott and Tomaso de Cola. Once that’s done, the document should presumably be ready to go to the next stage.</span><o:p></o:p></p><p class=MsoNormal><span style='color:black'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:black'>richard</span><o:p></o:p></p><p class=MsoNormal><span style='color:black'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:black'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:black'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:black'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:black;mso-fareast-language:EN-GB'><image001.png></span><o:p></o:p></p><p style='gfidisc.scisys.co.uk' id=gfidisc.scisys.co.uk><span style='font-family:"Tahoma","sans-serif";color:blue'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:gray;mso-fareast-language:EN-GB'>SCISYS UK Limited. Registered in England and Wales No. 4373530.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:gray;mso-fareast-language:EN-GB'>Registered Office: Methuen Park, Chippenham, Wiltshire SN14 0GB, UK.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.5pt;color:black;mso-fareast-language:EN-GB'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:green;mso-fareast-language:EN-GB'>Before printing, please think about the environment.</span><o:p></o:p></p></div></div></blockquote></div></blockquote></div></body></html>