June 1, 2003

Include Gauche as a target dialect.  Alex Shinn 
provided Gauche recognition to scmxlate (q.v.).

3h5

Mar 25, 2003

%assert documentation bugfix.  From Steve Pothier.

3h4

15 Jul 2001

Added optional Occurs Check, suggested by Brad Lucier.
Brad also points out that the examples/houses.scm
puzzle, as written, needs the Occurs Check.  ("as
written"...?  Well, Prolog doesn't have the Occurs
Check, and this famous puzzle is offered as an exercise
in the Prolog textbook _The Art of Prolog_ (Sterling &
Shapiro).  So I'm thinking perhaps there is a
less naive solution that doesn't rely on the Occurs
Check.)

3h3

Feb 28, 2000

Gambit port improvement from Brad Lucier: eval
define-macro explicitly to make macros usable after
loading

Sep 20, 1999

3h

Ported to Pocket Scheme (Ben Goetter) and Petite Chez Scheme.

Jan 31, 1999

3g1

Minor bugfix for Gambit install

May 2, 1998

3g

Ported to STk

April 19, 1998

3f

Porting mechanism refined: ports to mzscheme, scm,
guile, gambit, mitscheme, bigloo.

April 1997

3e

Extensible mechanism added for porting to various
Scheme dialects

3d

maybeini4gambit.scm (Brad Lucier)

Corrected () in evaluable positions to '(), as Gambit
won't accept unquoted ()s.  (Brad Lucier)

3c

maybeini4mzscheme.scm.

Equal strings unify (Paul Prescod).

HTML version of doc included.

v. 3b

Fixed bug in %and and %or.  (Using macros for now -- these were
procedures in v. 3, 3a.)

v. 3a

Added maybeini4mitscheme.scm (for Tore Amble).

March 1997

v. 3

Added syntax for asserting additional clauses to an existing
relation.

Set-predicates rewritten.  (Free variables given choice of
treatment as in Prolog.  Previously they had all been
assumed to be existentially quantified.)

Improved tutorial documentation.

Feb 1993

Second release.

1989

First release.