{Distance from sample}? {Energy on entering beamline component}? {Energy on leaving beamline component}? {Energy change caused by beamline component }? {Wavelength on entering beamline component}? {Wavelength spread FWHM on entering component}? {Divergence of beam entering this component}? {Wavelength on leaving beamline component}? {Polarization vector on entering beamline component}? {Polarization vector on leaving beamline component}? {Wavelength spread FWHM of beam leaving this component}? {Divergence FWHM of beam leaving this component}? {flux incident on beam plane area}? {Distribution of beam with respect to relevant variable e.g. wavelength. This is mainly useful for simulations which need to store plottable information at each beamline component. }?