create table link_objects (
  href text not null,
  title text,
  type text
);
comment on table link_objects is '
  Represents a link with some meta information.
';

comment on column link_objects.href is '
  An URI-reference pointing to the links target.
';
comment on column link_objects.title is '
  A human-readable label for the link.
';
comment on column link_objects.type is '
  Optional media type of the link's target.
';