Shows the unformatted bottom level of an
assembly. Unformatted level returns the bottom levels as a length in
mm so you can format them and include them into formulas
You can use this attribute as a user-defined attribute also in part marks and associative notes.
ASSEMBLY_BOTTOM_LEVEL attribute, the
ASSEMBLY_BOTTOM_LEVEL_UNFORMATTED attribute cannot be formatted
through the MarkDimensionFormat.dim file.