n attribute name and description; n data type and length; n any aliases that the attribute is known by; n whether the attribute is composite and, if so, the simple attributes that make up the composite attribute; n whether the attribute is multi-valued; n whether the attribute is derived and, if so, how it is to be computed; n any default value for the attribute. Figure 15.4 shows an extract from the data dictionary that documents the attributes for the Staff user views of DreamHome.