The following schema definition corresponds to the description tools of: ISO/IEC 15938-1 (Systems) + ISO/IEC 15938-1 Systems COR/1 ISO/IEC 15938-2 (DDL) ISO/IEC 15938-3 (Visual) + ISO/IEC 15938-3 Visual COR/1 ISO/IEC 15938-4 (Audio) ISO/IEC 15938-5 (MDS) + ISO/IEC 15938-5 MDS COR/1 This document contains tools defined as MPEG-7 specific extention of XML Schema in ISO/IEC 15938-2 The following section contains tools defined in ISO/IEC 15938-1 The following section contains tools defined in ISO/IEC 15938-2 The following section contains visual tools defined in ISO/IEC 15938-3 This section contains tools defined in ISO/IEC 15938-4 This section contains MDS tools defined in ISO/IEC 15938-5