New in the United States National CAD Standard®–V5

The AIA CAD Layer Guidelines, CSI Uniform Drawing System and NIBS Plotting Guidelines were designed, formatted, and carefully coordinated, so that all modules function as a whole. Below are highlights of the major revisions and additions to Version 5:

New "Distributed Energy" Discipline Designators.
New Level 2 Resource Discipline Designator for "Real Estate".
New "Abandoned" Status Field.
Expanded Discipline Designators for "Survey/Mapping".
New Major and Minor Groups definitions added to the "Architectural, Electrical, Fire Protection, Interior, Mechanical, Plumbing, Resource, Structural, and Telecommunications Layer Lists".
Revised flow of CAD Layer Guidelines Module to clarify that the Layer Lists by Disciplines are simply examples of some of the commonly used layers and not an all-inclusive list of layers.
Major and Minor Groups definitions from "Civil, Electrical, Mechanical, Plumbing, Resource, Structural, Survey/Mapping, and Telecommunications Layer Lists" made more generic to allow broader usage.
Expanded allowable file extension characters to 4 characters to respond to changes in software application file extensions.
New reference symbols for "interior elevation indicator single and multiple views", "azimuth indicator" and "3/32" architectural scale".
Revised line thickness of "note leaders" reference symbol.
New line symbol for "electrical direct current".
New identity symbol for "electrical interconnections with substations" and "electrical photovoltaic power".
New Implementation Guidelines "Appendix I – Implementation Guidelines".
Eliminated obsolete "Appendix C, G and H".