Assume EW are playing five-card majors and a 15-17 NT. I know there are different agreements for minor-suit openings. What are the common ways of handling this West hand?
If they open their longer minor (1♦) they have no rebid over 2♣ if 2NT shows 12-14.
They could agree to open 1♣ so that they can jump to 2NT over 1♠ to show 18-19 points (a 1NT rebid showing 12-14).
They could agree that the specific sequence 1♦ - 2♣; 2NT shows 18-19, even if 1M - 2♣; 2NT shows 12-14.
(I'm just hoping there's no support for some of the suggestions that have been voiced: for 1♦ - 2♣; 2♥, or an opening bid of 2NT.)
Sorry if this is basic bidding theory to you, but we were brought up on Acol here.