There is also the Flint Convention which we still have in our repertoire:
2♦ 3♦ asks for the better 5 card major. We don't use it often but we have no other use for the bid and has been very useful to set the ...
Take out with both red suits and not suitable for a takeout double of 1♣ (presumably because you are short in spades). Probably then also implies some club length (if not strength) because the red suits are probably only 4 cards.