I wonder if it is possible to add a term reference field with just a subset of the available taxonomy terms. Let me explain. I have a taxonomy vocabulary with a structure like this:
- term 1 - term 1.1 - term 1.2 - term 1.3 - term 2 - term 2.1 - term 2.2
Then I will create a specific content type and for that content type I will add a term reference field. Instead of referencing the whole vocabulary, I need to add only the options for, say, branch 2. I need to show options term 2.1 and term 2.2. In Drupal 6, the Node Reference field allows me to pull the options from a View. But this is a term reference field (it pulls the options from a given vocabulary) in Drupal 7.
I just want to avoid creating several different vocabularies, one for each content type, since their subject is more or less the same. In the future, I could take advantage of the fact that I have shared this resource instead of having a series of scattered vocabulary sets.