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<p>Hi DAL, Apps members,</p>
<p>For VOTable providers which want to see usable links in Aladin
here the basic recipe (see example below).<br>
</p>
<p>Just add <b><font color="#006600"><LINK</font></b> in your <font
color="#006600"><b><FIELD</b></font> which are describing
your URLs column. This method is described in the normative part
of VOTable document. By this way you will be able to describe the
"title of the link" and the "content-type" of the result (the URLs
are in the cells of the table)<br>
</p>
This simple LINK description in the FIELD will allows Aladin to
decide how to display your link, the title which will appear in the
table cells (instead of the full URL), and the action to do :<br>
<ul>
<li>basic link to open a web browser, <br>
</li>
<li>button to load your result in the Aladin itself (if the
content-type describes a datatype consumable by Aladin (image,
catalog, MOC, HiPS)), <br>
</li>
<li>button to send the result to an aware SAMP client for non
supported data type (spectrum for instance), </li>
<li>popup menu for a datalink stream</li>
<li>...</li>
</ul>
<p>Example: A link which returns Datalink results<br>
</p>
<p><tt> <FIELD name="access_url" ... ></tt><tt><br>
</tt><tt> <DESCRIPTION>Link to
DataLink</DESCRIPTION></tt><tt><br>
</tt><b><font color="#006600"><tt> <LINK
content-type="application/x-votable+xml;content=datalink"
title="Datalink"/></tt><tt><br>
</tt></font></b><tt> </FIELD></tt><tt><br>
</tt></p>
<img src="cid:part1.6CB46657.A41ABFB0@astro.unistra.fr" alt="">
<p><i>Note: This basic LINK annotation is limited to the general
case that all your URLs on a column return the same
content-type. Thus, it is not usable for a Datalink VOTable
content itself which can return mixed content-type results. In
this case, just follow the Datalink recommendation (access_url +
access_format columns)</i></p>
<p>Pierre<br>
</p>
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