# Functions
InsMapKeys - insert into mapKeys.
IsValidNoteName - is valid note name.
MergeKeys - return arr0 + arr1.
NewAppServDB - new AdaCoreDB.
NewUserDB - new UserDB.
RemoveKeys - remove keys.
RemoveNoteNode - remove notenode.
SearchKeys - search with keys.
# Constants
AppDataDBKey - This is AppDataDBKey.
AppServDBKeyPrefix - This is the prefix of AppServDBKey.
AppServDBName - app service database name.
AppUIDDBKeyPrefix - This is the prefix of AppUIDDBKey.
MinUID - mini userid.
NoteInfoDBKeyPrefix - This is the prefix of NoteInfo.
NoteNodeDBKeyPrefix - This is the prefix of NoteNode.
UserDataDBKeyPrefix - This is the prefix of UserDataDBKey.
UserDBKeyPrefix - This is the prefix of UserDBKey.
UserDBName - user database name.
UserIDDBKey - This is UserIDDBKey.