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

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

((id "compatible")
 (role directive)
 (description "R6RS+R7RS+keywords compatible syntax [Sagittarius]"))

((id "deprecated")
 (role directive)
 (description "display warning message of deprecated library [Sagittarius]"))

((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, SRFI 89]"))

((id "larceny")
 (role directive)
 (description "implies #!no-fold-case and #!err5rs [Larceny]"))

((id "nocache")
 (role directive)
 (description "disable cache on the current loading file [Sagittarius]"))

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

((id "no-overwrite")
 (role directive)
 (description "deny overwriting exported variables [Sagittarius]"))

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

((id "optional")
 (role keyword)
 (description "start optional arguments in lambda list [SRFI 89, MIT Scheme]"))

((id "err5rs")
 (role directive)
 (description "change to R7RS/R6RS syntax with extensions [Larceny]"))

((id "r5rs")
 (role directive)
 (description "change to R7RS syntax with #!fold-case [Larceny]"))

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

((id "r7rs")
 (role directive)
 (description "change to R7RS syntax with #!no-fold-case [Gauche, Larceny, Sagittarius]"))

((id "read-macro")
 (role directive)
 (description "#!read-macro=name is the same as #<name> [Sagittarius]"))

((id "reader")
 (role directive)
 (description "#!reader=name replaces the reader with that library [Sagittarius]"))

((id "rest")
 (role keyword)
 (description "start rest argument in lambda list [SRFI 89, MIT Scheme]"))

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

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