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action is not described

(taxonomy)_pre_edit_form action-hook . WP 3.0.0

Fires before the Edit Term form for all taxonomies.

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

Usage

add_action( '(taxonomy)_pre_edit_form', 'action_function_name_2122', 10, 2 );
function action_function_name_2122( $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)_pre_edit_form
wp-admin/edit-tag-form.php 68
do_action( "{$taxonomy}_pre_edit_form", $tag, $taxonomy ); ?>

Where the hook is used (in WP core)

Does not used.