No subject

[Andrea Preite Martinez]

Dear all,

I received from the IVOA Exec a request to modify all UCD1+ words that 
do not conform to what is said in the standard UCD document, i.e.:

  UCD1+ words at the same level in the hierarchy cannot be a starting  
substring of another

that is, we cannot have phot.flux and phot.fluxDens

As you know, the document at
http://www.ivoa.net/Documents/latest/UCDlist.html
is in the PR status, and will be moved to IVOA Recommendation after an 
appropriate action on the words concerned.

The rule mentioned above is violated for the following ucd1+ words:

E | phot.fluxDens               | Flux density (per wl/freq/energy interval)
E | phot.fluxDens.sb            | Flux density surface brightness
Q | phys.atmol                  | Atomic and molecular physics (shared 
properties)
Q | phys.atmol.branchingRatio   | Branching ratio
Q | phys.atmol.coll             | Related to collisions
Q | phys.atmol.configuration    | Configuration
Q | phys.atmol.crossSection     | Atomic / molecular cross-section
Q | phys.atmol.element          | Element
Q | phys.atmol.excitation       | Atomic molecular excitation parameter
Q | phys.atmol.final            | Quantity refers to atomic/molecular 
final/ground state, level, ecc.
Q | phys.atmol.initial          | Quantity refers to atomic/molecular 
initial state, level, ecc.
Q | phys.atmol.ion              | Ion
S | phys.atmol.ionization       | Related to ionization
S | phys.atmol.level            | Atomic level
Q | phys.atmol.lifetime         | Lifetime of a level
Q | phys.atmol.lineShift        | Line shifting coefficient
Q | phys.atmol.parity           | Parity
Q | phys.atmol.sweight          | Statistical weight
S | phys.atmol.trans            | Transition between states
Q | phys.energyDensity          | Energy-density
Q | phys.massToLight            | Mass to light ratio
Q | phys.massYield              | Mass yield

because of the already existing words
phot.flux
phys.at
phys.energy
phys.mass

In order to reach a rapid convergence on the reformulation of these 
words, I?m suggesting a possible solution for each of them in the list 
that follows:

    Present                       Suggested new
E | phot.fluxDens               | phot.flux.fluxDens  or: phot.flux.density
E | phot.fluxDens.sb            | phot.flux.fluxDens.sb  or: 
phot.flux.density.sb
Q | phys.atmol                  | suppress
Q | phys.atmol.branchingRatio   | phys.branchingRatio
Q | phys.atmol.coll             | phys.collision
Q | phys.atmol.configuration    | phys.state.configuration
Q | phys.atmol.crossSection     | phys.crossSection
Q | phys.atmol.element          | phys.element
Q | phys.atmol.excitation       | phys.excitation
Q | phys.atmol.final            | phys.state.final
Q | phys.atmol.initial          | phys.state.initial
Q | phys.atmol.ion              | phys.element.ion    S | 
phys.atmol.ionization       | phys.ionization
S | phys.atmol.level            | phys.level
Q | phys.atmol.lifetime         | phys.level.lifetime
Q | phys.atmol.lineShift        | phys.lineShift
Q | phys.atmol.parity           | phys.state.parity
Q | phys.atmol.sweight          | phys.state.sweight
S | phys.atmol.trans            | phys.state.trans   Q | 
phys.energyDensity          | phys.energy.density
Q | phys.massToLight            | phys.mass.light
Q | phys.massYield              | phys.mass.yield

The other possibility for the phys.atmol.xxx group is to suppress the 
word phys.at

Please let me know your opinion and/or your suggestions.

Andrea


==============================================================================
Andrea Preite Martinez                  andrea.preitemartinez at rm.iasf.cnr.it
Istituto di Astrofisica Spaziale        Tel.:+39.06.4993.4641
Area di Ricerca di Tor Vergata          Fax.:+39.06.2066.0188
Via del Fosso del Cavaliere 100         Cell:+39.320.43.15.383
00133 Roma                              CDS :+33.3.90242473
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