name for a mutually inclusive relationship

[Joe Pfeiffer]

Ethan Furman <ethan at stoneleaf.us> writes:

> I'm looking for a name for a group of options that, when one is specified, all of them must be specified.

I don't fully understand the question (yes, I read the part I snipped).

Why is this not just a single option?  Or is it hierarchical or
something so option 1 implies options 2 and 3, but option 2 does not
imply option 1?