The various types of submissions are intended to facilitate maintenance of the NPMS and minimize the effort required by pipeline operators.
All original submissions are additions.
All additions should contain geospatial data, attribute data, and metadata. There are three types of NPMS modifications. Operators should inform the repository of the type of modification being made. A geospatial modification is used if location data or location and attribute are to be modified. All geospatial modifications should contain geospatial data, attribute data, and metadata.