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Dear DAL members,<br>
<br>
This is a quick announcement for a minor revision of the<br>
UDF Catalogue Proposed Endorsed Note - version 1.2. This PEN is<br>
now released and may become an Endorsed Note at the next TCG
meeting.<br>
<br>
So, if this is of some interest for you, please have a review very
soon as it<br>
may be voted at the next TCG meeting. For questions and comments,
Markus and Jon<br>
will be glad to collect and answer to them.<br>
<br>
For reminder, this note aims to gather ADQL user defined functions
recommended<br>
by the IVOA. Such functions must be implemented by at least two
implementations<br>
in order to appear in this note. Those functions are prefixed by `<font
face="monospace">ivo_</font>`.<br>
ADQL/TAP service providers are strongly encouraged to follow the
definition of<br>
functions listed there for a given feature if already covered by a
function of<br>
this document. The goal is to prevent the dissemination of
variations of similar<br>
functions by defining a single function signature and behavior.<br>
Example of UDF already endorsed: `<font face="monospace">ivo_healpix_index(hpxOrder,
long, lat)</font>`.<br>
<br>
The previous version was <a
href="https://www.ivoa.net/documents/udf-catalogue/20231117/index.html">EN-1.1</a>
and was released on the 10th of October 2023.<br>
<br>
In this PEN-1.2 <i>(see the IVOA doc. version -<br>
<a href="https://ivoa.net/documents/udf-catalogue/20240807/"
class="moz-txt-link-freetext">https://ivoa.net/documents/udf-catalogue/20240807/</a>
- which matches<br>
<a href="https://github.com/ivoa-std/udf-catalogue">the version on
GitHub</a>)</i>, Jon and Markus have added the following
functions:<br>
<br>
- `<font face="monospace">ivo_epoch_prop</font>` and `<font
face="monospace">ivo_geom_transform</font>` as astrometry function<br>
- `<font face="monospace">ivo_simbadpoint</font>` as convenience
function<br>
- `<font face="monospace">ivo_normal_random</font>` as a statistics
function<br>
- `<font face="monospace">ivo_to_jd</font>` and `<font
face="monospace">ivo_to_mjd</font>` as a datetime functions<br>
- `<font face="monospace">ivo_hms_to_degrees</font>` and `<font
face="monospace">ivo_dms_to_degrees</font>` as a celestial
conversion functions<br>
<br>
Cheers,<br>
Grégory and Joshua
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