Shows the top level of an assembly. Top level takes the unit and accuracy from the MarkDimensionFormat.dim file. You can modify the settings in MarkDimensionFormat.dim in the Dimension Properties dialog box in a drawing.
You can use this attribute as a user-defined attribute also in part marks and associative notes.
This attribute returns the value as text, so you cannot use formulae with this attribute. Use ASSEMBLY_TOP_LEVEL_UNFORMATTED instead.