I’ve had this one in drafts for, checks notes, more than 3 years! And I thought it made sense to just push it out. Make sure it is known to the world, no matter if people want to use it or not.
So this is a document that uses the concepts of HD wallets. Masterkeys and derivations. It explains various neat things you can do with them and a standard numbering for those new ideas as I imagined or even use them today.
Please have fun, and maybe we can extend this with other known derivation path innovations people use today?