# Extensions

The prototype has some built-in extensions. Some are experimental, others are pretty stable. This chapter describes them.

The extensions are described from a user perspective. You may expect enough information to use the extension you want. If not, please notify the authors.

The extensions are *NOT* described from an implementors perspective. If you wish to change the extensions, you will need more information than is contained in this text. Please contact the authors for that purpose.
