Please stop the bickering. There's no need to argue as a valid question was asked and a valid reply was given. In fact Subhash, if I see a job opening for something I don't understand then I automatically assume that I am not qualified. Doesn't mean I won't research it in my spare time though, just as you are doing. It would seem that the writer of the position either was intentionally vague, or didn't know what s/he was writing about. So be it.