xapian/xapian — pull request #23 by aarshkshah1992 (2013-07-17 14:37:18+00:00)
Title: Base class for query expansion.

The code will not compile currently as I have only written the base class as of now. Have yet to use it at other places. But , please do let me know what you think of the base class for query expansion before I move ahead.