IVOA - Spectrum Data Model change request

[Markus Demleitner]

Hi DM,

On Fri, Oct 15, 2021 at 08:27:47PM +0200, Petr Skoda wrote:
> It is an order (marked m in https://en.wikipedia.org/wiki/Blazed_grating)
> of difraction - given by the number of wavelengths of monochromatic light
> where the diffaction occurs in given geometrical (angles of rays incidence,
> reflection) and construction (spacing of grating grooves) conditions.
> 
> I would suggest the name "absorder" or "difforder" or something similar in
> updated SDM.

Count me as one to do a reference implementation of absorder (perhaps
it should be absorder and relorder for symmetry?).

         -- Markus