Opening 2 Diamond:
4+
diamonds and 5+ in major, 10-14 HCP
2H= pass or correct if you have spades
2S= asking partner to pass with spades or return to diamonds
2NT= coventional asking bid (inv or better)
3C- hearts and max
3D – spades and max
3H – hearts and min
3S – spades and min
3D/4D/5D= preemptive
3C/H/S= 5+ cards, game force
3NT= 4-3-3-3 sign off