sawine@0: pattern        = "pattern" id "(" pattern_term ")"
sawine@0: pattern_term   = int_pt int_op int
sawine@0:                  | (char_pt | string_pt) string_op string
sawine@0:                  | string_array_pt string_array_op string_array
sawine@0:                  | string_array string_array_op string_array_pt
sawine@0:                  | string string_string_array_op 
sawine@0:                    (string_array_pt | char_array_pt )
sawine@0:                  | pattern_term ("or" | "and") pattern_term
sawine@0:                  | "not" pattern_term
sawine@0:                  | "(" pattern_term ")"