-----
(define-object-metadata
  (node-id                  node-id/current-node required constant (key 0))
  (seqno                    seqno/current-node   required constant (key 1))
  (type                     type                 required constant)
  (name                     string)
  (description              string)
  (version-ts               timestamp/next       required)
  (version-node-id          node-id/current-node required)
  (created                  wallclock            required constant)
  (created-by-node-id       node-id/current-user required constant)
  (created-by-seqno         seqno/current-user   required constant)
  (last-modified            wallclock            required)
  (last-modified-by-node-id node-id/current-user required)
  (last-modified-by-seqno   seqno/current-user   required))
-----

or

-----
(define-object-metadata
  (node-id                  : node-id/current-node required constant (key 0))
  (seqno                    : seqno/current-node   required constant (key 1))
  (type                     : type                 required constant)
  (name                     : string)
  (description              : string)
  (version-ts               : timestamp/next       required)
  (version-node-id          : node-id/current-node required)
  (created                  : wallclock            required constant)
  (created-by-node-id       : node-id/current-user required constant)
  (created-by-seqno         : seqno/current-user   required constant)
  (last-modified            : wallclock            required)
  (last-modified-by-node-id : node-id/current-user required)
  (last-modified-by-seqno   : seqno/current-user   required))
-----