boolean search class

Hi, all -- I'm implementing a search and would like to move beyond accepting this that other for simple any-word searching to a real boolean search. Has anyone seen any good classes or even functions for such? [No, the source contents are not in a database, so I won't be passing SQL code off to a real searcher.] TIA & HAND :-D -- David T-G * There is too much animal courage in (play) davidtg@justpickone.org * society and not sufficient moral courage. (work) davidtgwork@justpickone.org -- Mary Baker Eddy, "Science and Health" http://justpickone.org/davidtg/ Shpx gur Pbzzhavpngvbaf Qrprapl Npg!