Example of this: We want to use 041$a for a language code. We have an authorised value category to make Australian Indigenous language codes available, and have linked this to 041$a. However records in my catalogue might use English or European languages, which obviously are not included in my Australian Indigenous language authorised value category. I have to add them to the category to gain access to them when cataloguing. I would prefer to have another authorised value category (or categories) for other languages codes I might catalogue with, and be able to link them all to 041$a