This is a text description of mdobject.gif, which presents the hierarchical structure of the MdmObject class and its subclasses. The MdmObject class has the following subclasses: MdmSchema and MdmSource. The MdmSource class has the following subclasses: MdmDimensionedObject and MdmDimension. The MdmDimensionedObject class has the following subclasses: MdmAttribute and MdmMeasure. The MdmDimension class has the following subclasses: MdmHierarchicalDimension and MdmListDimension. The MdmHierarchicalDimension class has the following subclasses: MdmHierarchy and MdmLevel.