%globalent; %xinclude; ]> The Network Service Definition Language is used to specify the message exchange between client / server applications. The language specifies the messages, their parameters, message direction, timeout, authorization, delivery style, custom types, constants, and documentation for the service and each message, parameter, type, and constant. A compiler can then be used to process the NSDL into meta-data and code to support implementing clients and servers in a variety of different programming languages and environments with the help of a small runtime library. The NSDL uses syntax elements common to other programming languages: This is a note!