Scheme: Second R6RS draft published The second draft of R6RS, version 5.92, is now available at www.r6rs.org. (For more general information about Scheme standards, see the Standards page<http://schemers.org/Documents/Standards/>at schemers.org.)
This version of R6RS incorporates the responses to the formal comments<http://www.r6rs.org/formal-comments/>that were submitted prior to Nov 15th, 2006. A few of the changes are highlighted below (not intended to be comprehensive): - The report has been split into two separate documents: one for the base language <http://www.r6rs.org/r6rs_92.pdf>, and one for the standard libraries <http://www.r6rs.org/r6rs-lib_92.pdf>. (A third document is currently planned, to include certain non-normative appendices.) - The I/O system has been significantly revised. - A number of features have been dropped from the report, including the inexact arithmetic library and the declarations feature. - The report now includes a formal operational semantics, developed by Robby Findler and Jacob Matthews, building on their semantics for R5RS<http://lambda-the-ultimate.org/node/971>. - "Top-level programs" replace scripts in the base language, eliminating certain OS-specificities, with a specification for scripts to be added in a non-normative appendix. The current six-month public comment period is still ongoing, and will continue until March 15, 2007. The schedule subsequent to that date can be found here <http://www.r6rs.org/formal-comments/announce.html>. The editors encourage comments on the report, either informally on the [EMAIL PROTECTED]<http://lists.r6rs.org/cgi-bin/mailman/listinfo/r6rs-discuss>mailing list, or via the formal comment process <http://www.r6rs.org/process.html>. --Mitch Wand [Thanks to Anton van Straaten for this excellent summary!]
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