Level of detail from PARTdataManager

Key is the internal CADENAS LOD name, value is the reference set name in UG and the number of the target layer.

Syntax: Refset_name:layernumber(optional)

If the name is empty, the specified LOD will not be created.

If the layer number is empty (default), then the LOD will be created at the "solid" layer (default: 27)