Does anyone have know how to interpret the numeric designation used to specify "AtomicLevel" in the SpectralLineData command? For example:
SpectralLineData[Entity["AtomicLevel", "Neon::1::010001.000001"], "ElectronConfigurationString"]
Have you looked the StandardForm of this:
StandardForm
Entity["AtomicLevel", "Neon::1::010001.000001"]
It seems more human-readable.