<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">I suppose that the systematics of name-giving are relatively unimportant for UCD's (they are just tokens), but is there a reason why some terms are kept long and some short? E.g. "azi" versus "azimuth", a long "bidirectional" but a short "df" versus "distFunction" or "pdf", "electCharge" instead of "electricChange" (or simply "charge")?<div class=""><br class=""></div><div class="">Having too many hierarchical levels means hiding the context and adding unnecessarily many terms: since we discussed adding a PDF term for distribution functions anyway, how about</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>phys.reflectance.bidirectiona.df<span class="Apple-tab-span" style="white-space:pre"> </span>--><span class="Apple-tab-span" style="white-space:pre"> </span>phys,reflectance.bidirectional + stat.pdf</div><div class=""><br class=""></div><div class="">Rick</div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On 21 May 2018, at 00:30, Mireille Louys <<a href="mailto:mireille.louys@unistra.fr" class="">mireille.louys@unistra.fr</a>> wrote:</div><div class=""><div text="#000000" bgcolor="#FFFFFF" class=""></div></div></blockquote><br class=""><blockquote type="cite" class=""><div class=""><div text="#000000" bgcolor="#FFFFFF" class=""><font face="Times New Roman, Times, serif" class=""> Q | phys.electCharge | Electric charge <br class="">
Q | phys.current | Electric current<br class="">
Q | phys.current.density | Electric current density<br class="">
Q | pos.incidenceAng | Incidence angle of optical ray on an
interface<br class="">
Q | pos.emergenceAng | Emergence angle of optical ray on an
interface<br class="">
Q | pos.azimuth | azimuthal angle in a generic reference plane<br class="">
Q | phys.reflectance | Radiance factor (received radiance
divided by input radiance)<br class="">
Q | phys.reflectance.bidirectional | Bidirectional reflectance<br class="">
Q | phys.reflectance.bidirectional.df | Bidirectional
reflectance distribution function<br class="">
Q | phys.reflectance.factor | Reflectance normalized per
direction cosine of incidence angle<br class="">
S |pos.cylindrical |Related to cylindrical coordinates<br class="">
Q | pos.cylindrical.r | Radial distance from z-axis (cylindrical
coordinates)<br class="">
Q | pos.cylindrical.azi | Azimuthal angle around z-axis
(cylindrical coordinates)<br class="">
Q | pos.cylindrical.z | Height or altitude from reference plane
(cylindrical coordinates)<br class="">
S | pos.spherical | Related to cylindrical coordinates<br class="">
Q | pos.spherical.r | Radial distance or radius (spherical
coordinates)<br class="">
Q | pos.spherical.azi | Azimuthal angle (spherical coordinates)<br class="">
Q | pos.spherical.colat |Polar or Colatitude angle (spherical
coordinates)<br class="">
Q | pos.resolution | Spatial linear resolution (not angular)<br class="">
S | pos.bodycentric | Body-centric related coordinate<br class="">
S | pos.bodygraphic | Body-graphic related coordinate<br class="">
Q | meta.checksum | Numerical signature of digital data<br class="">
Q | phys.polarization.coherency | Matrix of the correlation
between components of an electromagnetic wave<br class="">
<br class="">
The full detailed discussion is available at the dedicated web
page <a moz-do-not-send="true" href="http://wiki.ivoa.net/twiki/bin/view/IVOA/UCDList1dot42017June2018FebRFM" class="">http://wiki.ivoa.net/twiki/bin/view/IVOA/UCDList1dot42017June2018FebRFM</a><br class="">
</font><font face="Times New Roman, Times, serif" class=""><font face="Times
New Roman, Times, serif" class="">We would like to have these terms
agreed by the TCG in order to validate UCD List version 1.4 <br class="">
</font></font><br class="">
<font face="Times New Roman, Times, serif" class=""><font face="Times New
Roman, Times, serif" class="">Please revise this list and express your
comments. <br class="">
</font></font><font face="Times New Roman, Times, serif" class=""><font face="Times New Roman, Times, serif" class="">Many thanks , <br class="">
</font></font><font face="Times New Roman, Times, serif" class=""><font face="Times New Roman, Times, serif" class="">Mireille (Semantics WG
chair)<br class="">
<br class="">
</font></font>
<div class="moz-signature"><br class="">
</div>
</div>
<span id="cid:D1BAE11C-88FE-4298-B920-30E0F45BE4B2@Belkin"><mireille_louys.vcf></span></div></blockquote></div><br class=""></div></body></html>