Pipe. Example of ODCLASS+ODEDIT for 3D polylines and lines.
Drawing.
For https://forums.autodesk.com/t5/civil-...
A definition with an Object Data attachment - ODCLASS.
File of the description of objects - ODCLASS.
Loading lengths, Z, adding values from other OD fields - ODEDIT.
Selects objects by values in OD - ODEDIT.
View and edit in tabular form - ODEDIT.