While working with OD can be a pain in the butt, there are tools out there that help. My limited knowledge of Map doesn't help. One tip was to export the file to a SDF file (Autocad version of GIS)
This drawing file had 2 classes attached to the object in the drawing that had the Object Data attached.
One class was STRUCTURES and it was attached to a point:
The second class was PIPES which was attached to a polyline:
You can see the object classes in the Map Explorer view:
So now you have all this data and you want to add some new classified objects.
Simple ~ right click and select Create Classified Objects...