Shows the top level of a single part, cast unit, assembly, part of a connection or a pour object.
Top level takes the unit and accuracy from MarkDimensionFormat.dim.
The datum level only affects the TOP_LEVEL attribute when Location by is set to Model origin or to the project base point that is in the model origin.
You can use this attribute as a user-defined attribute also in part marks and associative notes.
Note: This attribute returns the value as text, so you cannot use formulae with this attribute. Use TOP_LEVEL_UNFORMATTED instead.