Table: object (generic object)
   ------------------------------
    id
    type_id
    status
    parent_id
    creator_id
    created
    last_modified

  Table: notice (adds notice specific fields to the object table)
  ---------------------------------------------------------------
    id (1 to 1 relationship with object.id)
    notice_type (ie wedding, funeral, birth etc)
    title
    content
    etc

  Table: charity (adds charity specific fields to the object table)
  -----------------------------------------------------------------
    id (1 to 1 relationship with object.id)
    name
    description
    url
    etc


##</code><code>##


   Table: members  (link table)
   ----------------------------
    set_id    (in this example, the notice ID)
    member_id (in this example, the charity ID)


##</code><code>##

   $set = Set->new({
        set_id      => $notice->id,
        name        => 'imagelist',  # combined with set_id to provide an ID for caching
        selectors   => {
            type       => 'image'
        },
   });