<simple-condition>

Ultimately, there will be several, more logically separate libraries that extend Dylan or provide an application framework for users.
The common-dylan module.
Miscellaneous extensions to the Dylan language.
The class of conditions that take a format string.
A class.
The class of error conditions that consist of just an error message constructed from a format string and arguments.
A default class of restarts.
A default class of warnings that are described by a warning string.