This is a text description of mdmobjct.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: MdmDimension and MdmDimensionedObject. The MdmDimensionedObject class has the following subclasses: MdmAttribute and MdmMeasure. The MdmDimension class has the following subclasses: MdmPrimaryDimension and MdmSubDimension. The MdmPrimaryDimension class has the following subclasses: MdmMeasureDimension, MdmTimeDimension, and MdmStandardDimension. The MdmSubDimension class has the following subclasses: MdmHierarchy and MdmLevel. The MdmHierarchy class has the following subclasses: MdmLevelHierarchy and MdmValueHierarchy.