<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<p><br>
</p>
<p>Dear Reg (and Apps) contributors,</p>
<p>Still related to the Aladin v10 developement, another point that
I would like emphasize concerns <b>the current impossibility to
declare a table coverage in the VO registry</b>. Presently one
can define a unique coverage at catalog level, but not for
individual table.</p>
<p>However, a lot of catalogs are splitted in various tables which
have their own coverage. For instance I show below the Gaia DR1
catalog, and its 6 tables with the associated MOCs.</p>
<p>Presently Aladin v10 is not able to use the VO registry to
discover coverages (MOC) due to this limitation, and access
directly to the original providers (quite easy for CDS DB, but
more complex for others). The consequence for other tables are the
impossibility to use them correctly in the Aladin v10 Data access
tree even if they would have declared a catalog coverage.<br>
</p>
<p><b>The suggested solutions:</b></p>
<ol>
<li>Add a COVERAGE element in the TABLE element for allowing to
specify a MOC associated to a table (small impact - pragmatic
approach)<br>
</li>
<li>or Convince VO registry record authors to modify their VO
registry definitions in order to describe tables rather than
catalogs (big impact)<br>
</li>
</ol>
<p><img src="cid:part1.1B6FBA8C.BDA35570@astro.unistra.fr" alt=""></p>
<p><br>
</p>
<p>Comments, remarks, other solutions ?<br>
</p>
<p>Cheers<br>
Pierre<br>
</p>
</body>
</html>