A number of tex.stackexchange questions deal with citations and/or bibliographies. Sometimes an answer will be provided that uses the
biblatex package although the enquirer has not specifically addressed
biblatex. (The latest example of such a question is Is there a BibTeX style that sorts references in reverse chronological order?) Is it permissible to add the biblatex tag to such questions?
EDIT: I will (for the most part) follow Jukka Suomela's advice - that is, I will only add the biblatex tag to questions where an answer involving
biblatex became the accepted one. I have retroactively retagged the following questions: