A lexicon file has the suffix .lex
. It consists of any number of
values and constant definitions, each terminated by a semicolon. Each
value stands for a lexical entry. A value may contain named constants
and the operators .
, +
, -
, *
, and /
.
values, the lexical entries; The format of the lexical entries is free,
although it should be consistent with the conception of the whole rule
system.