module properties is

  import [
    account
    skos
  ]

  property accountId -> {1} account:AccountId is
    ;      ^ definition.field
    ;                       ^ reference.type
    @skos:prefLabel = "account identifier"
    ;^ reference.type
    @skos:definition = "an account Identifier."@en
    ;^ reference.type
  end

  structure Account is

    ref accountId
    ;   ^ reference.field

    name -> string

  end

end
