Am Sa., 15. Aug. 2020 um 18:46 Uhr schrieb Marc Nieper-Wißkirchen
<xxxxxx@nieper-wisskirchen.de>:

> > A feature only found in one Scheme standard,
>
> It is the latest standard that actually defines a condition system
> with at least some sophistication.

PS SRFI 34 & 35 (based on the withdrawn SRFI 12) also describe (a huge
portion) of this condition system.