Kodo queries provide many configuration parameters and functions beyond those of the standard javax.jdo.Query interface defined in JDO 1. For example, Kodo supports many JDO 2 preview features, such as aggregates, projections, grouping, having, custom result classes, and result ranges. SolarMetric's JDO Overview includes a a discussion of these JDO 2 query features in Chapter 11, Query. Access to JDO 2 preview APIs and other extended Kodo functionality is available through the kodo.query.KodoQuery interface.