Roman 2D bids are available in 12-15 and 17-20 ranges. They show 3-suited hands (4/4/4/1 or 5/4/4) with unspecified shortness. To find the shortness, responder bids 2NT, and opener bids the short suit.
S: KJxx H: Q D: AQxx C: xxxx S: AQxx H: KJxx D: Kxxx C: x W N E S 2D P 2N P 3C P 4S P/O Notes: 3C = club shortness.