You can search for identifiers within the package.
in-package search v0.2.0
String constants
val digits : string
String "0123456789"
val oct_digits : string
String "01234567"
val hex_digits : string
String "0123456789abcdefABCDEF"
val hex_digits_lc : string
String "0123456789abcdef"
val hex_digits_uc : string
String "0123456789ABCDEF"
val whitespace : string
String which includes tab, newline, return, vertical tab and form feed "\t\n\r\011\012 "
val empty : string
The empty string
val alpha_lower : string
String "abcdefghijklmnopqrstuvwxyz"
val alpha_upper : string
String "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
val alpha : string
Concatenation of alpha_lower and alpha_upper
alpha_lower
alpha_upper
val alphanum : string
Concatenation of alpha and digits
alpha
digits