# Not implemented (9618 features)

Part of the [pitfalls index](../PITFALLS.md).

- SET types (`SET`/`DEFINE` are reserved with dedicated errors).
- Random files (OPENFILE...FOR RANDOM/SEEK/GETRECORD/PUTRECORD; the RANDOM keyword is
  reserved and gives a dedicated parse error).
- DATE.
- Array-typed record fields, whole-array RETURN.
- Class inheritance (INHERITS/SUPER).