I noticed the following while glancing over SRFI 130:

    [The SRFI] omits the comparison, case-mapping, and mutation
    operations of SRFI 13, as well as all procedures already present in
    R7RS.

I think it would be better if it re-exported string-related procedures
in R7RS.  That way, one can import the SRFI without importing the R7RS
base and still get a full-fledged string library.  (Maybe one has an
alternative to (scheme base), some sort of DSL.)

Taylan