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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Georgia",serif;color:#1F497D">Hello Marcin,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Georgia",serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Georgia",serif;color:#1F497D">I finally had a chance to take a quick look through the state charts. Looking good. A couple of general observations:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Georgia",serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:12.0pt;font-family:"Georgia",serif;color:#1F497D"><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:12.0pt;font-family:"Georgia",serif;color:#1F497D">We will probably have to consider various guard conditions and/or do some sort of trade study as to our general approach for guard conditions. The typical
example of the kind of thing I’m thinking about has to do with those information entities that are more in a "support" role. For example, is deletion of a configuration profile to be allowed if there are a) service requests pending against the configuration
profile or b) service package executions pending against the configuration profile. And of course this also gets into things like trajectories, event sequences, etc. One approach is perhaps to allow for the deletion with the understanding that any scheduled
service packages still retain that information (we are really now getting into management service considerations). Another perhaps more "simple" approach is to categorically reject this and require that the client/user back things out in a sensible manner
meaning that they have to cancel the service package first. But of course that opens up another question of "computer science correct" versus what I might call "operationally pragmatic". (I can hear it already – “we want both!”)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:12.0pt;font-family:"Georgia",serif;color:#1F497D"><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:12.0pt;font-family:"Georgia",serif;color:#1F497D">In general we might want to consider recommending that pretty much all information entities have expiration dates. Including, even service catalogs. These
dates can be quite far into the future but I think there's a certain benefit in that there is some consideration from a standards point of view of having to refresh/reconfirm as opposed to promoting more of an entropy friendly point of view.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Georgia",serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Georgia",serif;color:#1F497D">I predict more interesting discussions ahead at the Berlin meetings!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Georgia",serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Georgia",serif;color:#1F497D">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Georgia",serif;color:#1F497D">-Erik<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Georgia",serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> SMWG <smwg-bounces@mailman.ccsds.org> <b>On Behalf Of
</b>Marcin.Gnat@dlr.de<br>
<b>Sent:</b> Monday, October 1, 2018 05:32<br>
<b>To:</b> smwg@mailman.ccsds.org<br>
<b>Subject:</b> [Smwg] AI2017-0512-54: Create draft Tech Note on State Machines<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><a name="Gruß"></a>Dear all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">And here is another debt which I had in terms of an Action Item. Please see attached draft Tech Note on State Machines. Also some small corresponding presentation (content is more or less same).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Uploaded to CWE as well:<o:p></o:p></p>
<p class="MsoNormal">Doc:<o:p></o:p></p>
<p class="MsoNormal"><a href="https://cwe.ccsds.org/css/docs/CSS-SM/CWE%20Private/Administration/Inter%20Recommendation/Models/Information%20Entities%20State%20Machine%20Model/StateMachinesForCSSMInformationEntities_TechNote-v0x1.docx">https://cwe.ccsds.org/css/docs/CSS-SM/CWE%20Private/Administration/Inter%20Recommendation/Models/Information%20Entities%20State%20Machine%20Model/StateMachinesForCSSMInformationEntities_TechNote-v0x1.docx</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">PowerPoint:<o:p></o:p></p>
<p class="MsoNormal"><a href="https://cwe.ccsds.org/css/docs/CSS-SM/CWE%20Private/Administration/Inter%20Recommendation/Models/Information%20Entities%20State%20Machine%20Model/AI2017-0512-11_Service_Package_State_Machine_20181015.pptx">https://cwe.ccsds.org/css/docs/CSS-SM/CWE%20Private/Administration/Inter%20Recommendation/Models/Information%20Entities%20State%20Machine%20Model/AI2017-0512-11_Service_Package_State_Machine_20181015.pptx</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">MagicDraw UML File:<o:p></o:p></p>
<p class="MsoNormal"><a href="https://cwe.ccsds.org/css/docs/CSS-SM/CWE%20Private/Administration/Inter%20Recommendation/Models/Information%20Entities%20State%20Machine%20Model/SP_StateMachine_20180925.zip">https://cwe.ccsds.org/css/docs/CSS-SM/CWE%20Private/Administration/Inter%20Recommendation/Models/Information%20Entities%20State%20Machine%20Model/SP_StateMachine_20180925.zip</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I saw Erik had planned some time during Fall Meetings for the State Machine topic, so maybe it would be not bad if you could drop an eye on this stuff (one more doc to be reviewed – add to the list of “Berlin Pointers” ;-). It’s not long
though… so maybe you can make it…<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best Regards<o:p></o:p></p>
<p class="MsoNormal">Marcin<o:p></o:p></p>
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