Hello.

Many thanks to Sebastian and Jens for this thoroughly
devised and edited SRFI draft!

I tried hard but could find only very few typos:

returing -> returning

else clause," -> "else clause",

hierachical -> hierarchical
  (several places)

either #t or #f.) -> either #t or #f).
  and many more sentences like this
  Each sentence should be punctuated correctly even when
  omitting (.) parts.

, resp.) -> . respectively).

provided as <?, <=? -> provided as =?, <?
  (to be more consistent with other parts)

possiblity -> possibility

beter -> better

Greetings
Sven