I just can't understand what the ontology plug-in is for and why would
anyone use it. From what I could understand from code, it uses the classes
in the specified owl file and uses them as keywords to refine the query.
Does this involve re-ranking as well? I tried using an owl file as
specified on wiki but it didnt have any effect on the reults. I wonder
whats going on. Can anyone who might have used and found it useful explain