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> The interface described here has been in use since 1986 or before, and > is currently supported by several of the major implementations. On the other hand, several implementation do not support it, but support alternative interfaces. This should have been discussed in the SRFI. Neither Kawa nor Guile support the new functions, but they instead provide call-with-input-string and call-with-output-string. Slib uses the latter. MIT Scheme has neither interface, but it provides a mix of both but using different names. Personally, I think the srfi-6 procedures provide a convenient, low-level, and efficient interface. But there *is* alternative prior art, which one could make a good case for choosing instead. --Per Bothner Cygnus Solutions bothner@xxxxxxxxxx http://www.cygnus.com/~bothner