[Related to 1.3.8 and 1.5.1]

Question regarding meta title, meta keywords, and meta description and differences between edits made within the admin interface and the meta_tags.php file.

Are additions/edits made within the meta_tags.php file merely appended to the information provided via the admin (inclusionary)?

Or, do changes made within the admin interface take priority and the meta_tags.php information not appear (exclusionary)?

Thanks for the help!

Cheers