[DrScheme logo] PLT Release Notes

Current Release: 51
Release Date: March 25, 1998.

This note summarizes the major differences between DrScheme v51 and v50.

The Future

PLT intends to conduct a major release by the end of this year or early next year. The changes will directly affect users of MrEd, the graphical toolbox. Please expect deletions of features, additions, and a few modifications. DrScheme will migrate to a graphical multi-module environment. This change should not affect beginners or teachers.

New Programs

MrSpidey

MrSpidey is now distributed as a separate tool. Download instructions are provided when downloading DrScheme. When installed, MrSpidey may be invoked from DrScheme.

Networking facilities

The networking-related routines have now been incorporated into the distribution. They are in the collection `net', and consist of the packages Documentation is in a subdirectory `docs', of the net collection directory. That subdirectory contains files named package.txt, where package ranges over the above names.

Miscellany

There is a new DrScheme vocabulary named "MrEd". This vocabulary does not provide source correlation for errors, but allows fast parsing and execution. In the next release, the MrEd vocabulary will become a language level.

Console I/O has been sped up, and is interruptible by using the Break button.

See the HISTORY files in notes/drscheme, notes/mzscheme, and notes/mred for descriptions of other bug fixes and minor changes.


Submit bugs using the web interface (encouraged) or send mail to plt-bugs@cs.rice.edu (discouraged).