<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p>
</p>
<p class="p1">Hi HEIG members, </p>
<p class="p1"><br>
</p>
<p class="p1">I have read again the content of this section :</p>
<p class="p1"><b>section 6 Proposal of the ivoa.obscore_hea
attributes</b></p>
<p class="p1"><b><br>
</b></p>
<p>It appears to me that the features in this table may be
applicable to a group of data sets , or to an <i>obs_collection</i>. <br>
I guess there is a global decision to define the reference system
of the data like <i>s_ref_energy, em_ref_energy, s_ref_oaa,
s_ref_oaa,<br>
</i>so may be this metadata can be factorized at the level of a
<i>part of an obs_collection. </i></p>
<p>Are their groups , data releases, that would share the same
reference systems? the same observing conditions like obs_mode,
tracking_mode, etc...</p>
<p>It relates to the way the Obs_collection is defined and possibly
organized as sub-groups. </p>
<p>Of course if it may change for every dataset, there would be no
gain to group these . </p>
<p>Best wishes, Mireille</p>
<p>
<style type="text/css">p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 14.3px Helvetica; color: #063d8a}</style><br>
</p>
<pre class="moz-signature" cols="72">--
--
Mireille Louys, MCF (Assistant Professor)
Centre de données Astronomiques (CDS) Equipe Images, ICube
Observatoire de Strasbourg Telecom Physique Strasbourg
11, rue de l' Université 300, Bd Sebastien Brandt CS 10413
F-67000 Strasbourg F-67412 Illkirch Cedex</pre>
</body>
</html>