    class
    	CODE_VALIDITY_CHECKER

    General
    	cluster: time
    	description: "Facility routines to check the validity of a DATE_TIME_CODE"

    Ancestors
    	ANY

    Queries
    	is_code (s: STRING_8): BOOLEAN
    	is_colon (s: STRING_8): BOOLEAN
    	is_comma (s: STRING_8): BOOLEAN
    	is_day (s: STRING_8): BOOLEAN
    	is_day0 (s: STRING_8): BOOLEAN
    	is_day_text (s: STRING_8): BOOLEAN
    	is_dot (s: STRING_8): BOOLEAN
    	is_fractional_second (s: STRING_8): BOOLEAN
    	is_hour (s: STRING_8): BOOLEAN
    	is_hour0 (s: STRING_8): BOOLEAN
    	is_hour12 (s: STRING_8): BOOLEAN
    	is_hour12_0 (s: STRING_8): BOOLEAN
    	is_meridiem (s: STRING_8): BOOLEAN
    	is_minus (s: STRING_8): BOOLEAN
    	is_minute (s: STRING_8): BOOLEAN
    	is_minute0 (s: STRING_8): BOOLEAN
    	is_month (s: STRING_8): BOOLEAN
    	is_month0 (s: STRING_8): BOOLEAN
    	is_month_text (s: STRING_8): BOOLEAN
    	is_second (s: STRING_8): BOOLEAN
    	is_second0 (s: STRING_8): BOOLEAN
    	is_separator (s: STRING_8): BOOLEAN
    	is_slash (s: STRING_8): BOOLEAN
    	is_space (s: STRING_8): BOOLEAN
    	is_year2 (s: STRING_8): BOOLEAN
    	is_year4 (s: STRING_8): BOOLEAN