(id bwp)
(role object)
(description "broken-weak-pair object [Chez Scheme]")

(id chezscheme)
(role directive)
(description "change to Chez Scheme read syntax")

(id eof)
(role object)
(description "end-of-file object [Chez Scheme, Chicken, Gambit, Kawa]")

(id false)
(role object)
(description "the boolean value false [R2RS, archaic]")

(id fold-case)
(role directive)
(description "change to case insensitive identifiers [R7RS]")

(id key)
(role keyword)
(description "start keyword arguments in lambda list [DSSSL]")

(id no-fold-case)
(role directive)
(description "change to case sensitive identifiers [R7RS]")

(id null)
(role object)
(description "the empty list [R2RS, archaic]; Java null [Kawa]")

(id optional)
(role keyword)
(description "start optional arguments in lambda list [DSSSL]")

(id r6rs)
(role directive)
(description "change to R6RS read syntax [R6RS]")

(id r7rs)
(role directive)
(description "change to R7RS read syntax")

(id rest)
(role keyword)
(description "start rest argument in lambda list [DSSSL]")

(id true)
(role object)
(description "the boolean value true [R2RS, archaic]")

(id void)
(role object)
(description "void object [Gambit, Kawa]")