Header (.h) File

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The generated C/C++ include file contains a section for each XSD type defined in the XSD source file. In general, there is a one-to-one correspondence between types defined in the XSD file and generated C type or C++ class definitions. In some cases, however, extra types/classes are generated to support certain XSD types. This occurs on XSD complex type definitions when the element nesting level is greater than two (see the section on Complex Types for details).

In addition to XSD types, code is also generated for global element definitions. If no other type references a global element, it is considered to be a main message element (also known as a protocol data unit or PDU). These elements are encoded into the main XML documents or messages that make up the given specification. An entry point encode and decode function is generated for each of these elements. The header file contains the function prototypes for these functions.