[Question] What's the specification of XpubDerivable? #7

Hi, I'm currently learning this library, but there are no documents or code comments available.

I would like to know how XpubDerivable str has been defined because it doesn't seem like a common one.

This is the format that I have frequently encountered:

[ccf488ef/m/84'/0'/0']xpub6DA9Gjn12MVZqNV96tL7dZDzzbg6BxYH4JJQmPJRKHASamJEe1X9NSKW8vgjhsevrP3qVbed2BjQcE4Qfk54bgsxUjMerN7iUTQxkXREwiu/*

Could you please explain how this is generated?

E.G. Why

• no m
• use h to replace '
• there is a <0;1> instead of a single number

Perhaps this question may seem silly, but as a newcomer, and there isn't too much material that I can check. I hope you don't mind me submitting this as an issue.