Comparators are a useful abstraction for data

structures like sets that may want to use different

implementation strategies.  However, SRFI 114 is

a full featured API with many utilities, and for the

simple purpose of this abstraction most of it is not

needed.

Could we have a (srfi 114 base) library that

provides only the predicates and accessors,

and possibly some subset of default predicates?

(notably eq? is special)

Nitpick: comparator-comparison-procedure? would

be better named comparator-has-comparison-procedure?.

But do we need this given the accessor?

You're overloading "compare" to mean both the

abstraction and ordered comparisons.  Could we

rename the ordering to be something like "less" or

"order"?

-- 

Alex