Lists the field definitions that describe each physical field in the dataset.
property Items[Index: Integer]: TABSAdvFieldDef; default;
Use Items to access a particular field definition. Specify the field definition to access with the Index parameter. Index is an integer identifying the field definition's position in the list of field definitions, in the range 0 to Count - 1.
For example, the following code displays the name of the first field definition in a label:
Label1.Caption := ABSTable1.AdvFieldDefs.Items.Name;