cadmodel class color descriptio docname docpath doctype docver elevation entcolor entity entlinetyp entlinewt fill ggroup gid handle headquarte layer level linetype linewt ltscale lvldesc lvlplot lyrcolor lyrfrzn lyrlinewt lyrlntype lyrlock lyron msctlg_d_1 msctlg_dmr mslink_d_1 mslink_dmr qrotw qrotx qroty qrotz refname zone