PhotDMv1.0 Utype List- M.Louys- 2012, April, 26 
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Utype	ucd 	defaultValue	datatype 	comment
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Datamodel.name	meta.id	PhotCalDM-v1.0	string	data model identification	

PhotometricSystem.name	meta.id	NULL string Usual name of this Photometricsystem
PhotometricSystem.description	meta.note	NULL string representation Photometricsystem
PhotometricSystem.detectorType	meta.code	0	enum int	Type of detector (e.g energy or photon counter)

PhotometryFilter.identifer	meta.ref.ivorn	NULL string	Unique identifer of filter within a Filter Profile Service (FPS)
PhotometryFilter.fpsIdentifier	meta.ref.ivorn	NULL	string	IVOA identifier of the Filter Profile Service
PhotometryFilter.name	meta.id;instr.filter NULL	string	Filter Name in the instrumental configuration
PhotometryFilter.description	meta.note	NULL string Text description of the filter band
PhotometryFilter.transmissionCurve.access.reference	meta.ref.ivorn	NULL	URIType	uri to the effective transmission curve
PhotometryFilter.transmissionCurve.access.format	meta.code	NULL	FormatType Format of the pointed resource file containing the transmission curve
PhotometryFilter.bandName	instr.bandpass	NULL string Generic name for the filter spectral band
PhotometryFilter.SpectralAxis.unit	meta.unit	angstrom	string	Unit of the spectral axis used to characterize it
PhotometryFilter.SpectralAxis.ucd	meta.ucd	em.wl	string	UCD for the nature of spectral axis wl, freq, energy
PhotometryFilter.SpectralAxis.coverage.location.value	em.wl;meta.main NULL string Reference position along the spectral axis. Spectral coordinate of the Zero Point
PhotometryFilter.SpectralAxis.coverage.bounds.extent	instr.bandwidth	NULL	double	Spectral axis extent of the filter
PhotometryFilter.SpectralAxis.coverage.bounds.start	em.wl;start	NULL double Minimum value of the filter spectral coverage
PhotometryFilter.SpectralAxis.coverage.bounds.stop	em.wl;.end	NULL double Maximum value of the filter spectral coverage
PhotometryFilter.dateValidityFrom	time.start	NULL string	Time stamp for Start of validity for this filter in ISOTime format
PhotometryFilter.dateValidityTo	time.end	NULL string	Time stamp for Stop of validity for this filter in ISOTime format

PhotCal.identifier	meta.ref.ivorn	NULL string Unique identifier of the Photometry	Calibration instance within a FPS
PhotCal.ZeroPoint.Flux.unit	meta.unit	Jy	string	unit for Zero point flux
PhotCal.ZeroPoint.Flux.ucd	meta.ucd	phot.flux.density	string	ucd for Zero point flux
PhotCal.ZeroPoint.Flux.value	phot.flux.density	NULL	double	flux value at Zero point associated to this filter
PhotCal.ZeroPoint.Flux.error	phot.flux.density; stat.error double	Error in the flux value at Zero point associated to this filter
PhotCal.ZeroPoint.referenceMagnitude.value	phot.mag	0.0	double	Reference magnitude used for zero point
PhotCal.ZeroPoint.referenceMagnitude.error	phot.mag;stat.error	0.0	Double	Error in the reference magnitude used for zero point
PhotCal.ZeroPoint.type	meta.code	0	enum int	Type of zero point
PhotCal.ZeroPoint.softeningParameter	obs.param	0	double	Correction parameter for luptitudes

PhotCal.MagnitudeSystem.type	meta.code	VEGAMag	string	Type of magnitude system
PhotCal.MagnitudeSystem.ReferenceSpectrumURI	meta.ref.ivorn NULL URIType	Reference SED or spectrum for this magnitude system