The name of the field in the listname working list that contains tree item captions. This is only valid for unlevelled lists and will be ignored if listtype is "levelled".
Default value
Blank. A valid field name from the listname working list must be specified.
Valid values
The name of a valid field, in single quotes. A list of fields in the listname working list can be chosen from by clicking the corresponding dropdown button in the property sheet.