I have a content type that needs a 'category' field; this can both be a taxonomy vocabulary or a text field (with the select widget), it doesn't really matter. (I won't have more then 5-6 voices at once.)
However, those voices may change over time, and normal users should be able to choose only few values when creating a new node.
What is the best practice to achieve this?
My idea is to use a taxonomy vocabulary, where only administrators can insert new voices, but I will need some kind of attribute (e.g., a boolean) that I can use in a module in order to filter them in
hook_form_alter(). Could this be a Drupal-ish way to achieve that?