| ExpandField Fields | 
The ExpandField type exposes the following members.
| Name | Description | |
|---|---|---|
| AddSteps | 
            The additional steps to reach the field item.
              | |
| Aggregation | 
            Defines if an aggregation function should be applied to the field.
              | |
| AttrDefDeclTypeName | 
            Defines the attribute declaring type the field refers to.
              | |
| AttrDefName | 
            Defines the attribute declaring type the field refers to.
              | |
| FieldType | 
            Defines the field type (ID, name, attribute, ...) the field refers to.
              | |
| GroupPriority | 
            A non-negative value defines that the result should be grouped by this field. 
            If multiple fields have a GroupPriority set, the field with the lowest value 
            has the highest grouping priority.
              | |
| ItemType | 
            Defines if the field refers to the object or the relationship.
              | |
| Name | 
            The field name.
              | |
| SortOrder | 
            The sort direction.
              | |
| SortPriority | 
            The sort priority for this field. Lower value means higher priority.
              | |
| StepRefIndex | 
            The index of the step the field refers to.
              |