After OPENER's 1 of a MAJOR and an opponent's DOUBLE , 2N is a Jordan limit raise (fit showing by RESPONDER).

Opener	OPP	Responder
1/1	Double	2N

     Responder's hand is a limit raise in support of Opener's Major opening.
For example:    Axx xxx Qx AJxxx

If you DON'T play Jordan, perhaps you use 2N as Jacoby and Game Forcing.

If you play Bergen Raises over doubles AND Jordan, 2N would be exactly a 3 card limit raise.