Q | arith                        	|  Arithmetic quantities
S | arith.diff                   	|  Difference between two quantities described by the same UCD
P | arith.factor                 	|  Numerical factor
P | arith.grad                   	|  Gradient
P | arith.rate                   	|  Rate (per time unit)
S | arith.ratio                  	|  Ratio between two quantities described by the same UCD
S | arith.squared                    	|  Squared quantity
S | arith.sum				|  Summed or integrated quantity
S | arith.variation                     |  Generic variation of a quantity
Q | arith.zp                     	|  Zero point
S | em                           	|  Electromagnetic spectrum
S | em.IR                        	|  Infrared part of the spectrum
S | em.IR.J                      	|  Infrared between 1.0 and 1.5 micron
S | em.IR.H                      	|  Infrared between 1.5 and 2 micron
S | em.IR.K                      	|  Infrared between 2 and 3 micron
S | em.IR.3-4um                  	|  Infrared between 3 and 4 micron
S | em.IR.4-8um                  	|  Infrared between 4 and 8 micron
S | em.IR.8-15um                 	|  Infrared between 8 and 15 micron
S | em.IR.15-30um                	|  Infrared between 15 and 30 micron
S | em.IR.30-60um                	|  Infrared between 30 and 60 micron
S | em.IR.60-100um               	|  Infrared between 60 and 100 micron
S | em.IR.NIR                    	|  Near-Infrared, 1-5 microns
S | em.IR.MIR                    	|  Medium-Infrared, 5-30 microns
S | em.IR.FIR                    	|  Far-Infrared, 30-100 microns
S | em.UV                        	|  Ultraviolet part of the spectrum
S | em.UV.10-50nm                	|  Ultraviolet between 10 and 50 nm EUV extreme UV
S | em.UV.50-100nm               	|  Ultraviolet between 50 and 100 nm
S | em.UV.100-200nm              	|  Ultraviolet between 100 and 200 nm FUV Far UV
S | em.UV.200-300nm              	|  Ultraviolet between 200 and 300 nm NUV near UV
S | em.X-ray                     	|  X-ray part of the spectrum
S | em.X-ray.soft                	|  Soft X-ray (0.12 - 2 keV)
S | em.X-ray.medium              	|  Medium X-ray (2 - 12 keV)
S | em.X-ray.hard                	|  Hard X-ray (12 - 120 keV)
Q | em.bin                       	|  Channel / instrumental spectral bin coordinate (bin number)
Q | em.energy                    	|  Energy value in the em frame
Q | em.freq                      	|  Frequency value in the em frame
Q | em.freq.cutoff               	|  cutoff frequency
Q | em.freq.resonance            	|  resonance frequency
S | em.gamma                     	|  Gamma rays part of the spectrum
S | em.gamma.soft                	|  Soft gamma ray (120 - 500 keV)
S | em.gamma.hard                	|  Hard gamma ray (>500 keV)
S | em.line                      	|  Designation of major atomic lines
S | em.line.HI                   	|  21cm hydrogen line
S | em.line.Lyalpha              	|  H-Lyalpha line
S | em.line.Halpha               	|  H-alpha line
S | em.line.Hbeta                	|  H-beta line
S | em.line.Hgamma               	|  H-gamma line
S | em.line.Hdelta               	|  H-delta line
S | em.line.Brgamma              	|  Bracket gamma line
S | em.line.OIII                 	|  [OIII] line whose rest wl is 500.7 nm
S | em.line.CO                		|  CO radio line,  e.g 12CO(1-0) at 115GHz
S | em.mm                        	|  Millimetric/submillimetric part of the spectrum
S | em.mm.30-50GHz               	|  Millimetric between 30 and 50 GHz
S | em.mm.50-100GHz              	|  Millimetric between 50 and 100 GHz
S | em.mm.100-200GHz             	|  Millimetric between 100 and 200 GHz
S | em.mm.200-400GHz             	|  Millimetric between 200 and 400 GHz
S | em.mm.400-750GHz             	|  Millimetric between 400 and 750 GHz
S | em.mm.750-1500GHz            	|  Millimetric between 750 and 1500 GHz
S | em.mm.1500-3000GHz           	|  Millimetric between 1500 and 3000 GHz
S | em.opt                       	|  Optical part of the spectrum
S | em.opt.U                     	|  Optical band between 300 and 400 nm
S | em.opt.B                     	|  Optical band between 400 and 500 nm
S | em.opt.V                     	|  Optical band between 500 and 600 nm
S | em.opt.R                     	|  Optical band between 600 and 750 nm
S | em.opt.I                     	|  Optical band between 750 and 1000 nm
S | em.pw                        	|  Plasma waves (trapped in local medium)
S | em.radio                     	|  Radio part of the spectrum
S | em.radio.20MHz               	|  Radio below 20 MHz
S | em.radio.20-100MHz           	|  Radio between 20 and 100 MHz
S | em.radio.100-200MHz          	|  Radio between 100 and 200 MHz
S | em.radio.200-400MHz          	|  Radio between 200 and 400 MHz
S | em.radio.400-750MHz          	|  Radio between 400 and 750 MHz
S | em.radio.750-1500MHz         	|  Radio between 750 and 1500 MHz
S | em.radio.1500-3000MHz        	|  Radio between 1500 and 3000 MHz
S | em.radio.3-6GHz              	|  Radio between 3 and 6 GHz
S | em.radio.6-12GHz             	|  Radio between 6 and 12 GHz
S | em.radio.12-30GHz            	|  Radio between 12 and 30 GHz
Q | em.wavenumber                	|  Wavenumber value in the em frame
Q | em.wl                        	|  Wavelength value in the em frame
Q | em.wl.central                	|  Central wavelength
Q | em.wl.effective              	|  Effective wavelength
Q | instr                        	|  Instrument
E | instr.background             	|  Instrumental background
Q | instr.bandpass               	|  Bandpass (e.g.: band name) of instrument
Q | instr.bandwidth              	|  Bandwidth of the instrument
Q | instr.baseline               	|  Baseline for interferometry
S | instr.beam                   	|  Beam
Q | instr.calib                  	|  Calibration parameter
S | instr.det                    	|  Detector
Q | instr.det.noise              	|  Instrument noise
Q | instr.det.psf                	|  Point Spread Function
Q | instr.det.qe                 	|  Quantum efficiency
Q | instr.dispersion             	|  Dispersion of a spectrograph
Q | instr.experiment             	|  Experiment or group of instruments
S | instr.filter                 	|  Filter
S | instr.fov                    	|  Field of view
S | instr.obsty                  	|  Observatory, satellite, mission
Q | instr.obsty.seeing           	|  Seeing
Q | instr.offset                 	|  Offset angle respect to main direction of observation
Q | instr.order                  	|  Spectral order in a spectrograph
Q | instr.param                  	|  Various instrumental parameters
S | instr.pixel                  	|  Pixel (default size: angular)
S | instr.plate                  	|  Photographic plate
Q | instr.plate.emulsion         	|  Plate emulsion
Q | instr.precision              	|  Instrument precision
Q | instr.rmsf                		|  Rotation Measure Spread Function
Q | instr.saturation             	|  Instrument saturation threshold
Q | instr.scale                  	|  Instrument scale (for CCD, plate, image)
Q | instr.sensitivity            	|  Instrument sensitivity, detection threshold
Q | instr.setup                  	|  Instrument configuration or setup
Q | instr.skyLevel               	|  Sky level
Q | instr.skyTemp                	|  Sky temperature
Q | instr.tel                    	|  Telescope
Q | instr.tel.focalLength        	|  Telescope focal length
S | instr.voxel				|  Related to a voxel (n-D volume element with n>2)
P | meta                         	|  Metadata
P | meta.abstract                	|  Abstract (of paper, proposal, etc.)
P | meta.bib                     	|  Bibliographic reference
P | meta.bib.author              	|  Author name
P | meta.bib.bibcode             	|  Bibcode
P | meta.bib.fig                 	|  Figure in a paper
P | meta.bib.journal             	|  Journal name
P | meta.bib.page                	|  Page number
P | meta.bib.volume              	|  Volume number
Q | meta.calibLevel              	|  Processing/calibration level
Q | meta.checksum 			|  Numerical signature of digital data
P | meta.code                    	|  Code or flag
P | meta.code.class              	|  Classification code
P | meta.code.error              	|  Limit uncertainty error flag
P | meta.code.member             	|  Membership code
P | meta.code.mime               	|  MIME type
P | meta.code.multip             	|  Multiplicity or binarity flag
P | meta.code.qual               	|  Quality, precision, reliability flag or code
P | meta.code.status             	|  Status code (e.g.: status of a proposal/observation)
P | meta.cryptic                 	|  Unknown or impossible to understand quantity
P | meta.curation                	|  Identity of man/organization responsible for the data
Q | meta.dataset                 	|  Dataset
Q | meta.email                   	|  Curation/contact e-mail
S | meta.file                    	|  File
S | meta.fits                    	|  FITS standard
P | meta.id                      	|  Identifier, name or designation
P | meta.id.assoc                	|  Identifier of associated counterpart
P | meta.id.CoI                  	|  Name of Co-Investigator
P | meta.id.cross                	|  Cross identification
P | meta.id.parent               	|  Identification of parent source
P | meta.id.part                 	|  Part of identifier, suffix or sub-component
P | meta.id.PI                   	|  Name of Principal Investigator or Co-PI
S | meta.main                    	|  Main value of something
S | meta.modelled                	|  Quantity was produced by a model
P | meta.note                    	|  Note or remark (longer than a code or flag)
P | meta.number                  	|  Number (of things; e.g. nb of object in an image)
S | meta.preview              		|  Related to a preview operation for a dataset
Q | meta.query              		|  A query posed to an information system or database or a property of it
P | meta.record                  	|  Record number
P | meta.ref                     	|  Reference or origin
P | meta.ref.doi		        |  DOI identifier (dereferenceable)
Q | meta.ref.ivoid                      |  Identifier as recommended  in the IVOA  (dereferenceable)
P | meta.ref.ivorn               	|  Identifier defined as IVORN, VO Resource Name (ivo://)  (deprecated)
P | meta.ref.uri                 	|  URI, universal resource identifier
P | meta.ref.url                 	|  URL, web address
S | meta.software                	|  Software used in generating data
S | meta.table                   	|  Table or catalogue
P | meta.title                   	|  Title or explanation
Q | meta.ucd                     	|  UCD
P | meta.unit                    	|  Unit
P | meta.version                 	|  Version
S | obs                          	|  Observation
Q | obs.airMass                  	|  Airmass
S | obs.atmos                    	|  Atmosphere, atmospheric phenomena affecting an observation
Q | obs.atmos.extinction         	|  Atmospheric extinction
Q | obs.atmos.refractAngle       	|  Atmospheric refraction angle
S | obs.calib                    	|  Calibration observation
S | obs.calib.flat               	|  Related to flat-field calibration observation (dome, sky, ..)
S | obs.calib.dark               	|  Related to dark current calibration
S | obs.exposure                 	|  Exposure
S | obs.field                  		|  Region covered by the observation
S | obs.image                    	|  Image
Q | obs.observer                 	|  Observer, discoverer
S | obs.occult                   	|  Observation of occultation phenomenon by solar system objects
S | obs.transit                  	|  Observation of transit phenomenon  : exo-planets
Q | obs.param                    	|  Various observation or reduction parameter
S | obs.proposal                 	|  Observation proposal
Q | obs.proposal.cycle           	|  Proposal cycle
S | obs.sequence                 	|  Sequence of observations, exposures or events
E | phot                         	|  Photometry
E | phot.antennaTemp             	|  Antenna temperature
Q | phot.calib                   	|  Photometric calibration
C | phot.color                   	|  Color index or magnitude difference
Q | phot.color.excess            	|  Color excess
Q | phot.color.reddFree          	|  Dereddened color
E | phot.count                   	|  Flux expressed in counts
E | phot.fluence                 	|  Radiant photon energy received by a surface per unit area or irradiance of a surface integrated over time of irradiation
E | phot.flux                    	|  Photon flux or irradiance
Q | phot.flux.bol                	|  Bolometric flux
E | phot.flux.density            	|  Flux density (per wl/freq/energy interval)
E | phot.flux.density.sb         	|  Flux density surface brightness
E | phot.flux.sb                 	|  Flux surface brightness
E | phot.limbDark                	|  Limb-darkening coefficients
E | phot.mag                     	|  Photometric magnitude
E | phot.mag.bc                  	|  Bolometric correction
Q | phot.mag.bol                 	|  Bolometric magnitude
Q | phot.mag.distMod             	|  Distance modulus
E | phot.mag.reddFree            	|  Dereddened magnitude
E | phot.mag.sb                  	|  Surface brightness in magnitude units
E | phot.radiance                	|  Radiance as energy flux per solid angle
Q | phys                         	|  Physical quantities
Q | phys.SFR                     	|  Star formation rate
E | phys.absorption              	|  Extinction or absorption along the line of sight
Q | phys.absorption.coeff        	|  Absorption coefficient (e.g. in a spectral line)
Q | phys.absorption.gal          	|  Galactic extinction
Q | phys.absorption.opticalDepth   	|  Optical depth
Q | phys.abund                   	|  Abundance
Q | phys.abund.Fe                	|  Fe/H abundance
Q | phys.abund.X                 	|  Hydrogen abundance
Q | phys.abund.Y                 	|  Helium abundance
Q | phys.abund.Z                 	|  Metallicity abundance
Q | phys.acceleration            	|  Acceleration
S | phys.aerosol                 	|  Relative to aerosol
Q | phys.albedo                  	|  Albedo or reflectance
Q | phys.angArea                 	|  Angular area
Q | phys.angMomentum             	|  Angular momentum
E | phys.angSize                 	|  Angular size width diameter dimension extension major minor axis extraction radius
E | phys.angSize.smajAxis        	|  Angular size extent or extension of semi-major axis
E | phys.angSize.sminAxis        	|  Angular size extent or extension of semi-minor axis
Q | phys.area                    	|  Area (in surface, not angular units)
S | phys.atmol                   	|  Atomic and molecular physics (shared properties)
Q | phys.atmol.branchingRatio    	|  Branching ratio
S | phys.atmol.collisional       	|  Related to collisions
Q | phys.atmol.collStrength      	|  Collisional strength
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, etc.
Q | phys.atmol.initial           	|  Quantity refers to atomic/molecular initial state, level, etc.
Q | phys.atmol.ionStage          	|  Ion, ionization stage
S | phys.atmol.ionization        	|  Related to ionization
Q | phys.atmol.lande             	|  Lande factor
S | phys.atmol.level             	|  Atomic level
Q | phys.atmol.lifetime          	|  Lifetime of a level
Q | phys.atmol.lineShift         	|  Line shifting coefficient
Q | phys.atmol.number            	|  Atomic number Z
Q | phys.atmol.oscStrength       	|  Oscillator strength
Q | phys.atmol.parity            	|  Parity
Q | phys.atmol.qn                	|  Quantum number
Q | phys.atmol.radiationType     	|  Type of radiation characterizing atomic lines (electric dipole/quadrupole, magnetic dipole)
Q | phys.atmol.symmetry          	|  Type of nuclear spin symmetry
Q | phys.atmol.sWeight           	|  Statistical weight
Q | phys.atmol.sWeight.nuclear   	|  Statistical weight for nuclear spin states
Q | phys.atmol.term              	|  Atomic term
S | phys.atmol.transition        	|  Transition between states
Q | phys.atmol.transProb         	|  Transition probability, Einstein A coefficient
Q | phys.atmol.wOscStrength      	|  Weighted oscillator strength
Q | phys.atmol.weight            	|  Atomic weight
Q | phys.columnDensity           	|  Column density
S | phys.composition             	|  Quantities related to composition of objects
Q | phys.composition.massLightRatio  	|  Mass to light ratio
Q | phys.composition.yield       	|  Mass yield
S | phys.cosmology               	|  Related to cosmology
Q | phys.current 			|  Electric current
Q | phys.current.density 		|  Electric current density
Q | phys.damping                 	|  Generic damping quantities
Q | phys.density                 	|  Density (of mass, electron, ...)
Q | phys.density.phaseSpace      	|  Density in the phase space
Q | phys.dielectric              	|  Complex dielectric function
Q | phys.dispMeasure             	|  Dispersion measure
S | phys.dust                    	|  Relative to dust
Q | phys.electCharge 			|  Electric charge
V | phys.electField              	|  Electric field
S | phys.electron                	|  Electron
Q | phys.electron.degen          	|  Electron degeneracy parameter
Q | phys.emissMeasure            	|  Emission measure
Q | phys.emissivity              	|  Emissivity
Q | phys.energy                  	|  Energy
Q | phys.energy.Gibbs          		|  Gibbs (free) energy or free enthalpy   [ G=H-TS ]
Q | phys.energy.Helmholtz          	|  Helmholtz free energy [ A=U-TS ]
Q | phys.energy.density          	|  Energy density
Q | phys.enthalpy          		|  Enthalpy  [ H=U+pv ]
Q | phys.entropy                 	|  Entropy
Q | phys.eos                     	|  Equation of state
Q | phys.excitParam              	|  Excitation parameter U
E | phys.fluence                 	|  Particle energy received  by a surface per unit area and integrated over time
Q | phys.flux                    	|  Flux or flow of particle, energy, etc.
Q | phys.flux.energy             	|  Energy flux, heat flux
Q | phys.gauntFactor             	|  Gaunt factor/correction
Q | phys.gravity                 	|  Gravity
Q | phys.ionizParam              	|  Ionization parameter
Q | phys.ionizParam.coll         	|  Collisional ionization
Q | phys.ionizParam.rad          	|  Radiative ionization
E | phys.luminosity              	|  Luminosity
Q | phys.luminosity.fun          	|  Luminosity function
E | phys.magAbs                  	|  Absolute magnitude
Q | phys.magAbs.bol              	|  Bolometric absolute magnitude
V | phys.magField                	|  Magnetic field
Q | phys.mass                    	|  Mass
Q | phys.mass.inertiaMomentum		|  Momentum of inertia or rotational inertia
Q | phys.mass.loss               	|  Mass loss
Q | phys.mol                     	|  Molecular data
Q | phys.mol.dipole              	|  Molecular dipole
Q | phys.mol.dipole.electric     	|  Molecular electric dipole moment
Q | phys.mol.dipole.magnetic     	|  Molecular magnetic dipole moment
Q | phys.mol.dissociation        	|  Molecular dissociation
Q | phys.mol.formationHeat       	|  Formation heat for molecules
Q | phys.mol.quadrupole          	|  Molecular quadrupole
Q | phys.mol.quadrupole.electric   	|  Molecular electric quadrupole moment
S | phys.mol.rotation            	|  Molecular rotation
S | phys.mol.vibration           	|  Molecular vibration
S | phys.particle                	|  Related to physical particles
S | phys.particle.neutrino       	|  Related to neutrino
S | phys.particle.neutron        	|  Related to neutron
S | phys.particle.proton         	|  Related to proton
S | phys.particle.alpha          	|  Related to alpha particle
S | phys.phaseSpace              	|  Related to phase space
E | phys.polarization            	|  Polarization degree (or percentage)
Q | phys.polarization.circular   	|  Circular polarization
Q | phys.polarization.coherency 	|  Matrix of the correlation between components of an electromagnetic wave
Q | phys.polarization.linear     	|  Linear polarization
Q | phys.polarization.rotMeasure   	|  Rotation measure polarization
Q | phys.polarization.stokes     	|  Stokes polarization
Q | phys.polarization.stokes.I   	|  Stokes polarization coefficient I
Q | phys.polarization.stokes.Q   	|  Stokes polarization coefficient Q
Q | phys.polarization.stokes.U 		|  Stokes polarization coefficient U
Q | phys.polarization.stokes.V 		|  Stokes polarization coefficient V
Q | phys.potential               	|  Potential (electric, gravitational, etc.)
Q | phys.pressure                	|  Pressure
Q | phys.recombination.coeff     	|  Recombination coefficient
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
Q | phys.refractIndex            	|  Refraction index
Q | phys.size                    	|  Linear size, length (not angular)
Q | phys.size.axisRatio          	|  Axis ratio (a/b) or (b/a)
Q | phys.size.diameter           	|  Diameter
Q | phys.size.radius             	|  Radius
Q | phys.size.smajAxis           	|  Linear semi major axis
Q | phys.size.sminAxis           	|  Linear semi minor axis
Q | phys.size.smedAxis           	|  Linear semi median axis for 3D ellipsoids
Q | phys.temperature             	|  Temperature
Q | phys.temperature.effective   	|  Effective temperature
Q | phys.temperature.electron    	|  Electron temperature
Q | phys.transmission            	|  Transmission (of filter, instrument, ...)
V | phys.veloc                   	|  Space velocity
Q | phys.veloc.ang               	|  Angular velocity
Q | phys.veloc.dispersion        	|  Velocity dispersion
Q | phys.veloc.escape            	|  Escape velocity
Q | phys.veloc.expansion         	|  Expansion velocity
Q | phys.veloc.microTurb         	|  Microturbulence velocity
Q | phys.veloc.orbital           	|  Orbital velocity
Q | phys.veloc.pulsat            	|  Pulsational velocity
Q | phys.veloc.rotat             	|  Rotational velocity
Q | phys.veloc.transverse        	|  Transverse / tangential velocity
S | phys.virial                  	|  Related to virial quantities (mass, radius, ..)
Q | phys.volume                  	|  Volume (in cubic units)
Q | pos                          	|  Position and coordinates
Q | pos.angDistance              	|  Angular distance, elongation
Q | pos.angResolution            	|  Angular resolution
Q | pos.az                       	|  Position in alt-azimutal frame
Q | pos.az.alt                   	|  Alt-azimutal altitude
Q | pos.az.azi                   	|  Alt-azimutal azimut
Q | pos.az.zd                    	|  Alt-azimutal zenith distance
Q | pos.azimuth 			|  Azimuthal angle in a generic reference plane
S | pos.barycenter               	|  Barycenter
S | pos.bodycentric 			|  Body-centric related coordinate
S | pos.bodygraphic 			|  Body-graphic related coordinate
S | pos.bodyrc                   	|  Body related coordinates
Q | pos.bodyrc.alt              	|  Body related coordinate (altitude on the body)
Q | pos.bodyrc.lat               	|  Body related coordinate (latitude on the body)
Q | pos.bodyrc.lon               	|  Body related coordinate (longitude on the body)
S | pos.cartesian                	|  Cartesian (rectangular) coordinates
Q | pos.cartesian.x              	|  Cartesian coordinate along the x-axis
Q | pos.cartesian.y              	|  Cartesian coordinate along the y-axis
Q | pos.cartesian.z              	|  Cartesian coordinate along the z-axis
S | pos.centroid            		|  Related to centroid position
S | pos.cmb                      	|  Cosmic Microwave Background reference frame
S | pos.cylindrical 			|  Related to cylindrical coordinates
Q | pos.cylindrical.azi 		|  Azimuthal angle around z-axis (cylindrical coordinates)
Q | pos.cylindrical.r 			|  Radial distance from z-axis (cylindrical coordinates)
Q | pos.cylindrical.z 			|  Height or altitude from reference plane (cylindrical coordinates)
Q | pos.dirCos                   	|  Direction cosine
V | pos.distance                 	|  Linear distance
S | pos.earth                    	|  Coordinates related to Earth
Q | pos.earth.altitude           	|  Altitude, height on Earth  above sea level
Q | pos.earth.lat                	|  Latitude on Earth
Q | pos.earth.lon                	|  Longitude on Earth
S | pos.ecliptic                 	|  Ecliptic coordinates
Q | pos.ecliptic.lat             	|  Ecliptic latitude
Q | pos.ecliptic.lon             	|  Ecliptic longitude
Q | pos.emergenceAng 			|  Emergence angle of optical ray on an interface
S | pos.eop                      	|  Earth orientation parameters
Q | pos.ephem                    	|  Ephemeris
Q | pos.eq                       	|  Equatorial coordinates
Q | pos.eq.dec                   	|  Declination in equatorial coordinates
Q | pos.eq.ha                    	|  Hour-angle
Q | pos.eq.ra                    	|  Right ascension in equatorial coordinates
Q | pos.eq.spd                   	|  South polar distance in equatorial coordinates
S | pos.errorEllipse             	|  Positional error ellipse
Q | pos.frame                    	|  Reference frame used for positions
S | pos.galactic                 	|  Galactic coordinates
Q | pos.galactic.lat             	|  Latitude in galactic coordinates
Q | pos.galactic.lon             	|  Longitude in galactic coordinates
S | pos.galactocentric           	|  Galactocentric coordinate system
S | pos.geocentric               	|  Geocentric coordinate system
Q | pos.healpix                  	|  Hierarchical Equal Area IsoLatitude Pixelization
S | pos.heliocentric             	|  Heliocentric position coordinate (solar system bodies)
Q | pos.HTM                      	|  Hierarchical Triangular Mesh
Q | pos.incidenceAng 			|  Incidence angle of optical ray on an interface
S | pos.lambert                  	|  Lambert projection
S | pos.lg                       	|  Local Group reference frame
S | pos.lsr                      	|  Local Standard of Rest reference frame
Q | pos.lunar                    	|  Lunar coordinates
Q | pos.lunar.occult             	|  Occultation by lunar limb
Q | pos.nutation                 	|  Nutation (of a body)
Q | pos.outline				|  Set of points outlining a region (contour)
Q | pos.parallax                 	|  Parallax
Q | pos.parallax.dyn             	|  Dynamical parallax
Q | pos.parallax.phot            	|  Photometric parallaxes
Q | pos.parallax.spect           	|  Spectroscopic parallax
Q | pos.parallax.trig            	|  Trigonometric parallax
Q | pos.phaseAng                 	|  Phase angle, e.g. elongation of earth from sun as seen from a third cel. object
V | pos.pm                       	|  Proper motion
Q | pos.posAng                   	|  Position angle of a given vector
V | pos.precess                  	|  Precession (in equatorial coordinates)
Q | pos.resolution 			|  Spatial linear resolution (not angular)
S | pos.spherical 			|  Related to spherical coordinates
Q | pos.spherical.azi 			|  Azimuthal angle (spherical coordinates)
Q | pos.spherical.colat 		|  Polar or Colatitude angle (spherical coordinates)
Q | pos.spherical.r 			|  Radial distance or radius (spherical coordinates)
S | pos.supergalactic            	|  Supergalactic coordinates
Q | pos.supergalactic.lat        	|  Latitude in supergalactic coordinates
Q | pos.supergalactic.lon        	|  Longitude in supergalactic coordinates
P | pos.wcs                      	|  WCS keywords
P | pos.wcs.cdmatrix             	|  WCS CDMATRIX
P | pos.wcs.crpix                	|  WCS CRPIX
P | pos.wcs.crval                	|  WCS CRVAL
P | pos.wcs.ctype                	|  WCS CTYPE
P | pos.wcs.naxes                	|  WCS NAXES
P | pos.wcs.naxis                	|  WCS NAXIS
P | pos.wcs.scale                	|  WCS scale or scale of an image
Q | spect                        	|  Spectroscopy
Q | spect.binSize                	|  Spectral bin size
S | spect.continuum              	|  Continuum spectrum
Q | spect.dopplerParam           	|  Doppler parameter b
E | spect.dopplerVeloc           	|  Radial velocity, derived from the shift of some spectral feature
E | spect.dopplerVeloc.opt       	|  Radial velocity derived from a wavelength shift using the optical convention
E | spect.dopplerVeloc.radio     	|  Radial velocity derived from a frequency shift using the radio convention
E | spect.index                  	|  Spectral index
S | spect.line                   	|  Spectral line
E | spect.line.asymmetry         	|  Line asymmetry
E | spect.line.broad             	|  Spectral line broadening
Q | spect.line.broad.Stark       	|  Stark line broadening coefficient
E | spect.line.broad.Zeeman      	|  Zeeman broadening
E | spect.line.eqWidth           	|  Line equivalent width
E | spect.line.intensity         	|  Line intensity
E | spect.line.profile           	|  Line profile
Q | spect.line.strength          	|  Spectral line strength S
E | spect.line.width             	|  Spectral line full width half maximum
Q | spect.resolution             	|  Spectral (or velocity) resolution
S | src                          	|  Observed source viewed on the sky
S | src.calib                    	|  Calibration source
S | src.calib.guideStar          	|  Guide star
Q | src.class                    	|  Source classification (star, galaxy, cluster, comet, asteroid )
Q | src.class.color              	|  Color classification
Q | src.class.distance           	|  Distance class e.g. Abell
Q | src.class.luminosity         	|  Luminosity class
Q | src.class.richness           	|  Richness class e.g. Abell
Q | src.class.starGalaxy         	|  Star/galaxy discriminator, stellarity index
Q | src.class.struct             	|  Structure classification e.g. Bautz-Morgan
Q | src.density                  	|  Density of sources
Q | src.ellipticity              	|  Source ellipticity
Q | src.impactParam              	|  Impact parameter
Q | src.morph                    	|  Morphology structure
Q | src.morph.param              	|  Morphological parameter
Q | src.morph.scLength           	|  Scale length for a galactic component (disc or bulge)
Q | src.morph.type               	|  Hubble morphological type (galaxies)
S | src.net                      	|  Qualifier indicating that a quantity (e.g. flux) is background subtracted rather than total
Q | src.orbital                  	|  Orbital parameters
Q | src.orbital.eccentricity     	|  Orbit eccentricity
Q | src.orbital.inclination      	|  Orbit inclination
Q | src.orbital.meanAnomaly      	|  Orbit mean anomaly
Q | src.orbital.meanMotion       	|  Mean motion
Q | src.orbital.node             	|  Ascending node
Q | src.orbital.periastron       	|  Periastron
Q | src.orbital.Tisserand        	|  Tisserand parameter (generic)
Q | src.orbital.TissJ            	|  Tisserand parameter with respect to Jupiter
Q | src.redshift                 	|  Redshift
Q | src.redshift.phot            	|  Photometric redshift
Q | src.sample                   	|  Sample
Q | src.spType                   	|  Spectral type MK
Q | src.var                      	|  Variability of source
E | src.var.amplitude            	|  Amplitude of variation
Q | src.var.index                	|  Variability index
Q | src.var.pulse                	|  Pulse
Q | stat                         	|  Statistical parameters
Q | stat.asymmetry			|  Measure of asymmetry
P | stat.correlation             	|  Correlation between two parameters
P | stat.covariance              	|  Covariance between two parameters
P | stat.error                   	|  Statistical error
P | stat.error.sys               	|  Systematic error
Q | stat.filling                 	|  Filling factor (volume, time, ..)
Q | stat.fit                     	|  Fit
P | stat.fit.chi2                	|  Chi2
P | stat.fit.dof                 	|  Degrees of freedom
P | stat.fit.goodness            	|  Goodness or significance of fit
S | stat.fit.omc                 	|  Observed minus computed
Q | stat.fit.param               	|  Parameter of fit
P | stat.fit.residual            	|  Residual fit
Q | stat.Fourier                 	|  Fourier coefficient
Q | stat.Fourier.amplitude       	|  Amplitude of Fourier coefficient
S | stat.fwhm				|  Full width at half maximum
S | stat.interval                     	|  Generic interval between two limits (defined as a pair of values)
P | stat.likelihood              	|  Likelihood
S | stat.max                     	|  Maximum or upper limit
S | stat.mean                    	|  Mean, average value
S | stat.median                  	|  Median value
S | stat.min                     	|  Minimum or lowest limit
Q | stat.param                   	|  Parameter
Q | stat.probability             	|  Probability
P | stat.rank				|  Rank or order in list of sorted values
P | stat.rms				|  Root mean square as square root of sum of squared values or quadratic mean
P | stat.snr                     	|  Signal to noise ratio
P | stat.stdev                   	|  Standard deviation as the square root of the variance
S | stat.uncalib                 	|  Qualifier of a generic uncalibrated quantity
Q | stat.value                   	|  Miscellaneous value
P | stat.variance                	|  Variance
P | stat.weight                 	|  Statistical weight
Q | time                         	|  Time, generic quantity in units of time or date
Q | time.age                     	|  Age
Q | time.creation                	|  Creation time/date (of dataset, file, catalogue,...)
Q | time.crossing                	|  Crossing time
Q | time.duration                	|  Interval of time describing the duration of a generic event or phenomenon
Q | time.end                     	|  End time/date of a generic event
Q | time.epoch                   	|  Instant of time related to a generic event (epoch, date, Julian date, time stamp/tag,...)
Q | time.equinox                 	|  Equinox
Q | time.interval                	|  Time interval, time-bin, time elapsed between two events, not the duration of an event
Q | time.lifetime                	|  Lifetime
Q | time.period                  	|  Period, interval of time between the recurrence of phases in a periodic phenomenon
Q | time.period.revolution       	|  Period of revolution of a body around a primary one (similar to year)
Q | time.period.rotation         	|  Period of rotation of a body around its axis (similar to day)
Q | time.phase                   	|  Phase, position within a period
Q | time.processing              	|  A time/date associated with the processing of data
Q | time.publiYear               	|  Publication year
Q | time.relax                   	|  Relaxation time
Q | time.release                 	|  The time/date data is available to the public
Q | time.resolution              	|  Time resolution
Q | time.scale                   	|  Timescale
Q | time.start				|  Start time/date of generic event
