National Institute of Building Sciences (NIBS)
Standards for CADs and building information modeling available from the NIBS.
The National Institute of Building Sciences (NIBS), through its buildingSMART alliance, publishes standards for structure design. The alliance creates both the United States National CAD Standard® (NCS) and the National Building Information Model Standard™ (NBIMS).
The NCS streamlines and simplifies the exchange of building design and construction data from project development throughout the life of a facility
The NBIMS provides open source standards and guidance for all aspects of building information modeling, allowing users to communicate quickly and efficiently, nationally and internationally.