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This may be uncouth for me as the editor of this SRFI, but NONOONONONONONONONONONONONNOOOOO Separate procedures is much better. I would *not* want all of the writes within a "parameterize"d block to suddenly get pretty-printed. There might be debugging messages buried in there. There might be writes going on to other ports. An out-of-band dynamically scoped write function (or read function) is too horrible to contemplate. And as far as precedent goes, PP (or PRETTY-PRINT) is already widely disseminated through SLIB, if nothing else. There is plenty of precedent for alternate names for alternative I/O operations. david rush -- Scheme: Because it *is* the red pill... -- Anton van Straaten (the Scheme Marketing Dept from c.l.s)