Two minor comments on SRFI-10:

What is `ctor' as used in `define-reader-ctor'?  A contraction
of `constructor'?  Why not spell it out?

I don't understand the statement

   A "Feature-based conditional expansion construct" introduced in
   SRFI-0 can easily be implemented as a read-time application.

Example 8 shows has #,(cond-expand ...), which is a use of SRFI-0,
not an implementation.  And it is an invalid use of #, because
`cond-expand' is syntax.
                                       -Richard Kelsey