The information in this document is identical to that found in appendixes B and C of the AutoCAD Customization Guide. Any updates to this document will be available from our Web site at http://www.autodesk.com/techpubs/autocad/dxf/. Or you can contact us by email at firstname.lastname@example.org. When inquiring about DXF Reference updates, please refer to this file's version number. The version number of this file is u14.1.04.