On 2020-10-26 07:55, Jörg wrote: > Here my proposal for doing this in standard Oberon-07. [...] > MODULE Usage; > IMPORT Data, Jsonify, Persistify; > TYPE > User = RECORD (Data.Tree) > j: Jsonify; > p: Persistify > END; You mean j: Jsonify.Methods and p: Persistify.Methods here, right? -- August