Now abandoned as there's so few Palm users around.
An application interface between pilot-link and QOF - the Query Object Framework. It supports writing palm data to QSF XML offline storage and running SQL-type queries on the live data or XML file. QSF XML can be imported into other QOF applications.
Pilot-QOF is intended to work with other programs through pipes and other interprocess methods. As such, pilot-qof outputs valid XML on success. If the search produced no results, the XML will be an empty QSF book in XML. The lack of a match to a search can be a valid result, e.g. checking that a book does not contain data from before a certain date. This behaviour is common to all QOF queries.