UCD vocabulary revision : first iteration of the maintance procedure

[Frederic V. Hessman]

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")?

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

	phys.reflectance.bidirectiona.df		-->		phys,reflectance.bidirectional + stat.pdf

Rick

> On 21 May 2018, at 00:30, Mireille Louys <mireille.louys at unistra.fr> wrote:

>   Q | phys.electCharge | Electric charge 
>   Q | phys.current | Electric current
>   Q | phys.current.density | Electric current density
>   Q | pos.incidenceAng | Incidence angle of optical ray on an interface
>   Q | pos.emergenceAng | Emergence angle of optical ray on an interface
>   Q | pos.azimuth | azimuthal angle in a generic reference plane
>   Q | phys.reflectance | Radiance factor (received radiance divided by input radiance)
>   Q | phys.reflectance.bidirectional | Bidirectional reflectance
>   Q | phys.reflectance.bidirectional.df | Bidirectional reflectance distribution function
>   Q | phys.reflectance.factor | Reflectance normalized per direction cosine of incidence angle
>   S |pos.cylindrical |Related to cylindrical coordinates
>   Q | pos.cylindrical.r | Radial distance from z-axis (cylindrical coordinates)
>   Q | pos.cylindrical.azi | Azimuthal angle around z-axis (cylindrical coordinates)
>   Q | pos.cylindrical.z | Height or altitude from reference plane (cylindrical coordinates)
>   S | pos.spherical | Related to cylindrical coordinates
>   Q | pos.spherical.r | Radial distance or radius (spherical coordinates)
>   Q | pos.spherical.azi | Azimuthal angle (spherical coordinates)
>   Q | pos.spherical.colat |Polar or Colatitude angle (spherical coordinates)
>   Q | pos.resolution | Spatial linear resolution (not angular)
>   S | pos.bodycentric | Body-centric related coordinate
>   S | pos.bodygraphic | Body-graphic related coordinate
>   Q | meta.checksum | Numerical signature of digital data
>   Q | phys.polarization.coherency | Matrix of the correlation between components of an electromagnetic wave
> 
> The full detailed discussion is available at the dedicated web page  http://wiki.ivoa.net/twiki/bin/view/IVOA/UCDList1dot42017June2018FebRFM <http://wiki.ivoa.net/twiki/bin/view/IVOA/UCDList1dot42017June2018FebRFM>
> We would like to have these terms agreed by the TCG in order to validate UCD List version 1.4 
> 
> Please revise this list and express your comments. 
> Many thanks , 
> Mireille (Semantics WG chair)
> 
> 
> <mireille_louys.vcf>

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