# Release notes for version 0.4, 20230901.

```
/******************************************************************************
 * This file is part of The Unicode Tools Of Rexx (TUTOR)                     *
 * See https://rexx.epbcn.com/TUTOR/                                          *
 *     and https://github.com/JosepMariaBlasco/TUTOR                          *
 * Copyright © 2023-2025 Josep Maria Blasco <josep.maria.blasco@epbcn.com>    *
 * License: Apache License 2.0 (https://www.apache.org/licenses/LICENSE-2.0)  *
 ******************************************************************************/
```

The main changes in the 0.4 release are (a) a big upgrade to the Rexx tokenizer, and (b) a complete rewrite of ``rxu.rex``,
the Rexx Preprocessor for Unicode, to take advantage of the improvements in the tokenizer.

To know more about the upgraded tokenizer, please refer [to its readme file](https://rexx.epbcn.com/tokenizer/).
Changes to the Rexx Preprocessor for Unicode are internal, and should not affect its functionality. If at all, you should find that the new version is more smooth and stable.
