Documentation

I'd like to know what best practice is on documenting a new database that I
created. What type of diagrams and definitions and how specific or high
level should the documentation be?
Thanksthat's hard to answer without knowing the particulars of your database
or application, however, i use the following guideline for documenting
pretty much anything i work on: if someone new were to take over your
role, would they have enough documentation to do the job?
sorry for the unspecific answer.
arthur