The Data Dictionary is the central place where all field definitions are stored and maintained. All User Defined Fields (UDF's) are defined in the Data Dictionary. In addition, this core component of ExtraView controls many of the attributes of each field, such as where it is used, its display type, display title, whether the field is selectable on reports, its default value, default attributes and help text. Global attributes may be defined for a field. These optional attributes determine properties of the field which can be inherited wherever the field is used. For example, you might provide a SIZE global attribute to a text field. Wherever this field is used as input, it will then adopt this SIZE, although the size might be overridden on an individual form. Correct settings in the Data Dictionary are essential to a smooth running system. Although it is possible to alter every field within the ExtraView, it is recommended that you only make changes when you thoroughly understand what the consequences will be.
