This section lists the parameters in this subassembly that can be mapped to a target object such as a surface, alignment, or profile object in a drawing. Setting targets is required when the geometry of one or more of an assembly's component subassemblies require corresponding surfaces, alignments, or profiles for defining that geometry. The object names must be mapped from the subassembly definition to the corresponding drawing objects. For more information, see Setting and Editing Targets in the AutoCAD Civil 3D User's Guide Help.