Just checked and your cds parser supports that (in current master, i.e., without this PR). But would that generally be true?

Actually, from http://cds.u-strasbg.fr/doc/catstd-3.2.htx, it is not obvious that one cannot just give a scale factor as a unit; you mentioned elsewhere the cds standard was not always clear, but it does work on Vizier's unit calculator: http://vizier.u-strasbg.fr/cgi-bin/Unit?text=75%2B1.10-3 (well, somewhat -- the numerical factor is not always interpreted correctly, as a `.` is taken to be multiplication even within the factor...  but this is true also if one tries, e.g., `75 1.2x10-12m`)

Since this is related to my PR in that generic now also accepts strings just containing a number, shall I adjust cds to output a plain scale factor for ?