ISO/IEC 13522-5:1997在附录A和附录B中规定了MHEG-5物体的两种功能等效符号 那份文件。ISO/IEC 13522的这一部分规定了MHEG-5对象的第三种功能等效符号 XML 1.0（“万维网联盟W3C推荐的可扩展标记语言”）。这 规范在附录A中的DTD中明确表示。 ISO/IEC 13522的本部分绝不会使ISO/IEC 13522-5:1997的任何条款失效或替代。

ISO/IEC 13522-5:1997 specifies two functionally equivalent notations for MHEG-5 objects in Annexes A and B of that document. This part of ISO/IEC 13522 specifies a third functionally equivalent notation for MHEG-5 objects in XML 1.0 ("Extensible Markup Language" as recommended by World Wide Web Consortium, W3C). This specification is unambiguously expressed in the DTD contained in Annex A. This part of ISO/IEC 13522 in no way invalidates or substitutes for any clauses of ISO/IEC 13522-5:1997.