feedvalidator.py lists timepoint column name as unrecognized

[ustroetz]

feedvalidator returns that the column timepoint in the table stop_times.txt is an unrecognized column. However Google lists it as a valid column.

Unrecognized Column

Unrecognized column timepoint in file stop_times.txt. This might be a misspelled column name (capitalization matters!). Or it could be extra information (such as a proposed feed extension) that the validator doesn't know about yet. Extra information is fine; this warning is here to catch misspelled optional column names.
in line 1 of stop_times.txt
trip_id arrival_time    departure_time  stop_id stop_sequence   stop_headsign   pickup_type drop_off_type   shape_dist_traveled timepoint