* Documentation: doc/
* Composite value: composite/
* Container: container/
* Query: query/
* View: view/

- Mass UPDATE

  This could be very useful in data migration code. In fact, need to
  add an example in the manual when this is supported.

! Diagnose lack of default ctor if object used in relationship

  Got two questions on the mailing list about that in one week. Maybe
  always diagnose lack of public ctor? Maybe with a warning if no
  relationship? The no_ctor pragma like no_id?