WordPress at a glance
action is not described

(taxonomy)_edit_form_fields action-hook . WP 3.0.0

Fires after the Edit Term form fields are displayed.

The dynamic portion of the hook name, $taxonomy, refers to the taxonomy slug.

Usage

add_action( '(taxonomy)_edit_form_fields', 'action_function_name_1356', 10, 2 );
function action_function_name_1356( $tag, $taxonomy ){
	// action...
}
$tag(object)
Current taxonomy term object.
$taxonomy(string)
Current taxonomy slug.

Where the hook is called

In file: /wp-admin/edit-tag-form.php
(taxonomy)_edit_form_fields
wp-admin/edit-tag-form.php 223
do_action( "{$taxonomy}_edit_form_fields", $tag, $taxonomy );

Where the hook is used (in WP core)

Does not used.