We are trying to use tags as a lightweight classification tool, as opposed to categories. It would be useful to require a tag from more than one tag group. In this case we would like to require a tag from the ‘equity-, debt-, or alt-’ tag group, and also require a tag from the ‘Deal Status’ tag group. Is it possible?
No, this is not possible at the current time. It also sounds extremely complicated to explain to users.
Another use case for this would be a writing site, we want to require a tag from a genre group and then a sub-genre.
Tag groups are an excellent feature, and requiring tags from separate groups would improve it even more.
Considering that when you create a topic in a category that requires a tag from a group, it won’t show you any other tags until you select from there, it shouldn’t be confusing to the end-user that they have to pick a tag from the ones they can see, and when they do, the second selection presents it self.