Keyword listener questions

1. Can we make the attribute in CTD searchable so we can use SearchQuery (faster) Ans: No
2. From Email:
   1. This is a create *and* update listener for CTDs that have a "keyword" attribute. Assume: Yes
   2. Content instances are created if a keyword CI does not exist, but if it does (query case sensitive?) then nothing is done for that keyword. Assume: Yes
   3. What happens if a keyword is deleted in a particular content instance? We can't go on checking every content instance to see if they are not using a particular keyword. Assume: Yes