; quoted string of SP and VCHAR without DQUOTE
;
; NOTE: ABNF strings are case-insensitive.
; Hence: rulename = "abc" and: rulename = "aBc"
; will match "abc", "Abc", "aBc", "abC", "ABc", "aBC", "AbC", and "ABC".
; To specify a rule that IS case SENSITIVE, specify the characters individually.
; For example:
; rulename = %d97 %d98 %d99
; or
; rulename = %d97.98.99
; will match only the string that comprises only the lowercased characters, abc.
; bracketed string of SP and VCHAR without angles
; prose description, to be used as last resort