WebSphere MQ classes for Java Message Service consists of a number of Java classes and interfaces that are based on the Sun javax.jms package of interfaces and classes. Clients should be written using the Sun interfaces and classes that are listed below, and that are described in detail in the following sections. The names of the WebSphere MQ objects that implement the Sun interfaces and classes have a prefix of "MQ" (unless stated otherwise in the object description). The descriptions include details about any deviations of the WebSphere MQ objects from the standard JMS definitions. These deviations are marked with '*'.