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<pre class="" wrap="">Dear all,
Within the scope of the current TimeSeries priority (see below
ada's email) we (Ada + Laurent + Mireille + myself) have been reviewing
the "TimeSeries Cube data Model" note.
As a first step we concentrated on section 4 = "Time Series Cube DM" and
let the discussion of the beginning of the paper (section 1 to 3,
including "dependent data models") for the future. The only assomption
we make is that TimeSeriesDataModel should be derived/specialized from a
Sparse Cube ( see IVOA N-dimesnional Cube Model - volute link, with the
last diagrams modified available at ....)
A very important point here is that we think we have to make a
conceptual modelisation without any a priori for the serializations or
Mappings we may use in the end. We have to understand the relationships
between the various concepts we need and follow the VO-DML rules
(as defined in the VO-DML spec / document 1) for Model design.
The product of this phase of analysis should be an UML diagram
with some text to explain it.
In the following messages we will discuss Jiri's note section 4
along these principles. They will come a little later those days.
Best regards
François Bonnarel</pre>
<br>
<div class="moz-cite-prefix">Le 04/07/2017 à 13:08, AdaNebot a
écrit :<br>
</div>
<blockquote
cite="mid:FB110877-4F9B-4EEF-B831-53923494189A@astro.unistra.fr"
type="cite">
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<span class=""><br class="">
Dear All, <br class="">
</span>
<div class="" style="border: 0px; margin: 0px; padding: 0px;
color: rgb(38, 43, 51); font-variant-ligatures: normal; orphans:
2; widows: 2; background-color: rgb(255, 255, 255);"><br
class="">
</div>
<div class="" style="border: 0px; margin: 0px; padding: 0px;
color: rgb(38, 43, 51); font-variant-ligatures: normal; orphans:
2; widows: 2; background-color: rgb(255, 255, 255);">In Shanghai
it was decided that TimeSeries is a scientific priority of the
IVOA. Based on the DAL/DM/TDIG session, here is a list of items
to be discussed. Please feel free to add any other items you
consider relevant to TimeSeries and you would like to discuss: </div>
<div class="" style="border: 0px; margin: 0px; padding: 0px;
color: rgb(38, 43, 51); font-variant-ligatures: normal; orphans:
2; widows: 2; background-color: rgb(255, 255, 255);">
<div class="" style="border: 0px; margin: 0px; padding: 0px;">
<div class="" style="border: 0px; margin: 0px; padding: 0px;">
<div class="" style="border: 0px; margin: 0px; padding:
0px;">
<div class="" style="border: 0px; margin: 0px; padding:
0px;">
<ul class="">
<li class=""><b class=""><span class="">What is
TimeSeries data?</span> </b><font class="">It is
a temporal sequence of measurements containing a
time coordinate and a flux (or similar -
magnitude) / RV / position / polarisation / number
of spots / spectra / images. </font>Light-curves
and RV curves dominate the landscape of TimeSeries. </li>
<li class=""><span class=""><b class="">Concerning DM:</b></span> there
are models that work for representation of some of
the science cases proposed by the SPC. </li>
<ul class="">
<li class="">Modified SpectrumDM works fine for
light curves<font class=""> with some
modifications.</font></li>
<li class=""><font class="">The draft TimeSeriesCube
serialisation examples work with SPLAT. But
there’s still some discussion needed on the
model. </font></li>
<li class="">Feedback from people who have tried
both models is appreciated in this respect. </li>
<li class=""><font class="">Although light-curves
and RV curves dominate the landscape of
TimeSeries, for which a modified version of
SpectrumDM (or a similar for RVs) would work, we
should have an<span class=""> extensible model
towards other kind of data, perhaps </span></font>built
as a simple derivation/specialization of the
SparseCube DM.</li>
</ul>
<li class=""><span class=""><b class="">Discovery:</b> </span>Obscore/EpnCore
+ TAP could work if the time axis information would
be extended. What are the minimum mandatory fields
for TimeSeries data to be found by the user? For
that collecting science cases is important. A set of
minimum data has already been compiled during an
ASTERICS meeting. Different communities need to be
properly represented. Attending to astronomy
meetings is important to hear the astro-community.
See the series of meetings under: <span class=""><a
moz-do-not-send="true"
href="http://wiki.ivoa.net/twiki/bin/view/IVOA/IvoaVOEvent#Future_Events"
class="">http://wiki.ivoa.net/twiki/bin/view/IVOA/IvoaVOEvent#Future_Events</a></span>.
Please if you plan to attend any of these meetings
or any other related Time Domain meeting it would be
useful to know it and to post it on the wiki. </li>
<li class=""><span class=""><b class="">Format:</b> </span>Time
has to be properly formatted to combine data coming
from different surveys. See email from A. Rots (19
May 2017) sent to DM, DAL and TDIG +
reference A&A 574, 36 (2015). </li>
</ul>
</div>
</div>
<div class="" style="border: 0px; margin: 0px; padding:
0px;">To keep track these items will be posted on the TDIG
wiki, under the TimeSeries section: </div>
<span class=""><a moz-do-not-send="true"
href="http://wiki.ivoa.net/twiki/bin/view/IVOA/IvoaVOEvent#Time_Series_Data"
class="">http://wiki.ivoa.net/twiki/bin/view/IVOA/IvoaVOEvent#Time_Series_Data</a></span></div>
<div class="" style="border: 0px; margin: 0px; padding: 0px;"><br
class="">
</div>
<div class="" style="border: 0px; margin: 0px; padding: 0px;">In
particular under: <a moz-do-not-send="true"
href="http://wiki.ivoa.net/twiki/bin/view/IVOA/DAL_DM_TDIG"
class="">http://wiki.ivoa.net/twiki/bin/view/IVOA/DAL_DM_TDIG</a> I
have already written these four items. </div>
<div class="" style="border: 0px; margin: 0px; padding: 0px;"><br
class="">
<div class="" style="border: 0px; margin: 0px; padding:
0px;">You can also find a summary of the different
contributions in the DAL/DM/TDIG Shanghai session under: </div>
<span class=""><a moz-do-not-send="true"
href="http://wiki.ivoa.net/twiki/bin/view/IVOA/DAL_DM_TDIG_ShanghaiSession2017"
class="">http://wiki.ivoa.net/twiki/bin/view/IVOA/DAL_DM_TDIG_ShanghaiSession2017</a></span></div>
<div class="" style="border: 0px; margin: 0px; padding: 0px;"><span
class=""><br class="">
</span>
<div class="" style="border: 0px; margin: 0px; padding:
0px;">The intention of this email is to start productive
discussions on each topic. </div>
<div class="" style="border: 0px; margin: 0px; padding:
0px;"> </div>
<div class="" style="border: 0px; margin: 0px; padding:
0px;">Thanks!</div>
<div class="" style="border: 0px; margin: 0px; padding:
0px;">Ada</div>
</div>
</div>
</div>
</blockquote>
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