The taxonomy system doesn't have any meta_data feature. Without constructing another table, your option seems to me to be to store the taxonomy information in the $wpdb->options table using the appropriate functions.

Honestly, I can't help but think that you are trying to use the taxonomy system for something beyond what it was meant for and that you should be considering post meta or a custom post type.

Or, you should be using multiple taxonomines-- one for directory, one for the director's nationality, etc.

It is hard to say more without more detail about your project, but that's what I've got for now.

The taxonomy system doesn't have any meta_data feature. Without constructing another table, your option seems to me to be to store the taxonomy information in the $wpdb->options table using the appropriate functions.

Honestly, I can't help but think that you are trying to use the taxonomy system for something beyond what it was meant for and that you should be considering post meta or a custom post type.

Or, you should be using multiple taxonomines-- one for directory, one for the director's nationality, etc.

I would say to use the multiple taxonomies, or create your own table to hold the taxonomy meta. I worry about performance though. The taxonomy queries are complicated.