Keywords: linedb

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# Coding the quantum numbers

In the LINEDB offline databases, as well as in JPL and ``old'' (non-VAMDC) CDMS, the quantum numbers of the lower and upper transition levels are encoded in a character string. This appendix describes the recipe to be used for encoding. It duplicates the pages `https://www.astro.uni-koeln.de/cdms/catalog` and `https://www.astro.uni-koeln.de/node/475` for memory.

Subsections

- Quantum numbers
- Aggregate spin number