The Morgan and Morgan Compact Photo-Lab-Index (1977 edition) lists Kodak Developer D-11 as "An Elon-Hydroquinone Process Developer for Process and Panchromatic Process Films & Plates." Developing directions are: Develop about 5 minutes in a tank or 4 minutes in a tray at 68 deg. F. When less contrast is desired, the developer should be diluted with an equal volume of water.
Kodak D-11 stock solution is a less energetic developer than Kodak D-72 stock solution(the precursor of Dektol).
However, if you compare the D-11 stock solution with D-72 stock diluted 2:1 (as you do for developing enlarging papers) the two should be fairly close to each other in performance.
D-11 stock (developing agents, sulfite & alkali)
Elon (Metol)---------------------------1 gram/liter
Hydroquinone--------------------------9 grams/liter
Sodium Sulfite (anhydrous)-------------75 grams/liter
Sodium Carbonate (monohydrated)-----30 grams/liter
D-72 stock (developing agents, sulfite & alkali)
Elon (Metol)----------------------------3 grams/liter
Hydroquinone--------------------------12 grams/liter
Sodium Sulfite (anhydrous)-------------45 grams/liter
Sodium Carbonate (monohydrated)------80 grams/liter