
- The single most useful thing to add IMHO is a referential-integrity
  operator. This is something that still requires a lot of thinking,
  but it could maybe be done with an external NoSQL table that 
  describes the relationships between tables and foreign keys.
  Because of the very model of NoSQL, it will still be possible
  for other operators to break the relations, unless they explicitly
  check them with this hypotetical operator.

- The 'help' operator should take an operator as argument and display 
  at least the associated command-line switches, followed by the 
  generic pointer to the online documentation. This can be done by 
  extending the current cmdlist.rdb table, adding a column with
  the varius switches, with a subfield separator that allows to format
  them in the output.

