<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div style="display: block;">Hello DM,</div><div style="display: block;"><br></div><div style="display: block;">Last merged </div><div style="display: block;"> <a href="https://github.com/ivoa-std/MANGO/pull/80">https://github.com/ivoa-std/MANGO/pull/80</a></div><div style="display: block;"><br></div><div style="display: block;">- Upgrade following he Mark’s suggestions(see below)</div><div style="display: block;">- The data origin package (mango:origin) has been modified to be closer to the vizier requirements.</div><div style="display: block;"><br></div><div style="display: block;">Bye</div><div style="display: block;">LM</div><div style="display: block;"><br></div><div style="display: block;"><div style="-webkit-user-select: all; -webkit-user-drag: element; display: inline-block;" class="apple-rich-link" draggable="true" role="link" data-url="https://github.com/ivoa-std/MANGO/releases/tag/auto-pdf-preview"><a style="border-radius:10px;font-family:-apple-system, Helvetica, Arial, sans-serif;display:block;-webkit-user-select:none;width:300px;user-select:none;-webkit-user-modify:read-only;user-modify:read-only;overflow:hidden;text-decoration:none;" class="lp-rich-link" rel="nofollow" href="https://github.com/ivoa-std/MANGO/releases/tag/auto-pdf-preview" dir="ltr" role="button" draggable="false" width="300"><table style="table-layout:fixed;border-collapse:collapse;width:300px;background-color:#E5E6E9;font-family:-apple-system, Helvetica, Arial, sans-serif;" class="lp-rich-link-emailBaseTable" cellpadding="0" cellspacing="0" border="0" width="300"><tbody><tr><td vertical-align="center" align="center"><img style="width:300px;filter:brightness(0.97);height:150px;" width="300" height="150" draggable="false" class="lp-rich-link-mediaImage" alt="auto-pdf-preview.png" src="cid:226855DE-A89D-445A-8478-F27593A37C94"></td></tr><tr><td vertical-align="center"><table bgcolor="#E5E6E9" cellpadding="0" cellspacing="0" width="300" style="font-family:-apple-system, Helvetica, Arial, sans-serif;table-layout:fixed;background-color:rgba(229, 230, 233, 1);" class="lp-rich-link-captionBar"><tbody><tr><td style="padding:8px 0px 8px 0px;" class="lp-rich-link-captionBar-textStackItem"><div style="max-width:100%;margin:0px 16px 0px 16px;overflow:hidden;" class="lp-rich-link-captionBar-textStack"><div style="word-wrap:break-word;font-weight:500;font-size:12px;overflow:hidden;text-overflow:ellipsis;text-align:left;" class="lp-rich-link-captionBar-textStack-topCaption-leading"><a rel="nofollow" href="https://github.com/ivoa-std/MANGO/releases/tag/auto-pdf-preview" style="text-decoration: none" draggable="false"><font color="#272727" style="color: rgba(0, 0, 0, 0.847059);">Release Auto PDF Preview · ivoa-std/MANGO</font></a></div><div style="word-wrap:break-word;font-weight:400;font-size:11px;overflow:hidden;text-overflow:ellipsis;text-align:left;" class="lp-rich-link-captionBar-textStack-bottomCaption-leading"><a rel="nofollow" href="https://github.com/ivoa-std/MANGO/releases/tag/auto-pdf-preview" style="text-decoration: none" draggable="false"><font color="#808080" style="color: rgba(0, 0, 0, 0.498039);">github.com</font></a></div></div></td></tr></tbody></table></td></tr></tbody></table></a></div></div><br id="lineBreakAtBeginningOfMessage"><div>
<meta charset="UTF-8"><div dir="auto" style="text-align: start; text-indent: 0px; overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div dir="auto" style="text-align: start; text-indent: 0px; overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div><br></div></div></div></div><div><blockquote type="cite"><div>On 20 Feb 2025, at 17:16, Laurent Michel <laurent.michel@astro.unistra.fr> wrote:</div><br class="Apple-interchange-newline"><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div>Mark,</div>
<div><br></div><div><br></div><div>Thank you for the meeting notes.</div><div><br></div><div>I would just comment on the following point:</div><div><br><blockquote type="cite"><div>On 20 Feb 2025, at 15:31, CresitelloDittmar, Mark via dm <dm@ivoa.net> wrote:</div><br class="Apple-interchange-newline"><div><meta charset="UTF-8"><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><font face="monospace"> o [MCD] restatement of concern..</font></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><font face="monospace"> EpochPosition is a 2nd mode of representing content which can be done</font></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><font face="monospace"> with the Measurement types. This is generally considered bad practice.</font></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><font face="monospace"> I would be MUCH happier with the object if it were associated with </font></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><font face="monospace"> GAIA data, more than the "Epoch Propagation" use case. i.e. that it</font></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><font face="monospace"> is an object which supports the very complex GAIA (or GAIA-like) data</font></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><font face="monospace"> which the Measurements model is currently unable to support.</font></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><font face="monospace"> That would give providers/clients a more clear picture of WHEN to use</font></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><font face="monospace"> this Object over the PhysicalProperty representation.</font></div><br class="Apple-interchange-newline"></div></blockquote></div><br><div>- There is no doubt that the EpochPosition class complies with the GAIA use-case.</div><div>But describing the position of stars in a 6D space is a physical reality that we need to model with something describing these vectors and the way their coordinates can be correlated.</div><div>For this reason, I do not think we should rename the class “EpochPosition” as “GAIAsomething” (if this is what you propose) .</div><div>PROPOSAL : make the link with GAIA very explicit in the class description as well the reason why it is flatten.</div><div><br></div><div>- I agree with you that having to different ways to model the same quantity is not desirable, but the fact is that one property (EpochPropagation) encloses the other (meas:LonLatPosition), thus, the use-cases overlap. </div><div> Faced with this situation, I reaffirm that importing one model from another is done first by sharing the same description for the same quantities, which is done for EpochPosition vs Meas:*, and that making these imports machine-operable comes as an extra-feature which may cost a lot. Therefore, it is wise to keep EpochPropagation as a MANGO native (complicated) class and meas:LonLatPosition as an imported one.</div><div>PROPOSAL: recommend to use meas:LonLatPosition for simple positions (but the model cannot enforce such a rule).</div><div><br></div><div>Laurent</div></div></div></blockquote></div><br></body></html>