What actually happens to a content type's term reference field if you (1) edit/change a taxonomy term or (2) delete a term (considering the taxonomy is part of a live content type)?
I'm wondering as I'm considering giving users the ability to add to taxonomies if the term is not already available. If I'm correct I think if I allow them to add new terms in can add them to (A) a new taxonomy (which easily distinguishes the new terms to check) or (B) to the end of the existing taxonomy (which I ever I choose).
However, as in the original question I'm wondering what effect such changes would have considering they are used in a content type. So in my example I would be letting them add to a 'job type' taxonomy. So what would happen if in the instance someone added 'film runner' but (1) had spelt it wrong so I had to edit it to the correct spelling or (2) I decided to delete it because it was not relevant? Would this mean that in instance (1) - editing it - the content type's term reference field would simply be updated to reflect the new edit? In the case of (2) - deleting the term - what would happened then? Would it mean the content type's term reference field would be empty?
Additionally, how would this effect Views in the sense that the Taxonomy Term might be used for an exposed filter? In (1) - edited - would this have any effect or would it simply be updated with new change? In (2), would it mean that the exposed filter would just no longer have that term on deletion?
Any advice would be greatly appreciated.