This is a simple terminology question. If you have a dropdown list (as an example) with user-defined values, what do you call values such as "All", "None" that you might also have in the list?
For example, I might have a list of names as follows:
What term is used to refer to the "(All)" value? I've been using the term "pseudo-value" but I pretty much just made that up.
Also, just for clarification, I'm not referring to a term that would be presented in the UI (necessarily); just a term for design discussions.