I recently at the completion of an address book, want to refer to the device's database is how to store contact information,
I learned that there were four: the most important table mimetypes \ contacts \ raw_contacts \ data, but in addition to mimetypes table, other table field I can all understand, the meaning of online mentioned to me four tables of the interpretation of the field is not complete, so I want to ask if there is any official documentation? Or for which a great god help me explain