You open 1♦ and partner bids 1♥. What is your plan?
Feel free to assume whatever methods you usually play, provided that 1♦ is a reasonable opening on this hand and 1♥ response would be natural and forcing.
With regard to what partner's expected to do if/when you rebid 1NT, I'm sure most of us would correct to 2♥ with KJT97 of hearts and few other cards, and that almost no one would correct with 76543 of hearts and outside values. The question is what you expect from partner on a "typical" minimum response holding exactly five hearts.

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ing) tr. v. - Any bid made by bridge player with which partner disagrees.