Ed8/3

EdXI means Division of an eleventh interval into n equal parts.

Division of an eleventh (e. g. 8/3) into n equal parts

Division of e. g. the 8:3 into equal parts can be conceived of as to directly use this interval as an equivalence, or not. The question of equivalence has not even been posed yet. The utility of 8:3 or another eleventh as a base though, is apparent by being used at the base of so much modern tonal harmony. Many, though not all, of these scales have a pseudo (false) octave, with various degrees of accuracy.