ISO/IEC 15938-10:2005 specifies a metadata system for describing multimedia content. It specifies the schema definition across all parts of ISO/IEC 15938. ISO/IEC 15938-10:2005 collects together the description tools specified in ISO/IEC 15938, assigns a namespace designator, and specifies the resulting syntax description in a single schema using description definition language from ISO/IEC 15938-2.