图形文件DWG数据格式及信息传递

The ODA specification for the OpenDWG file format provides the complete results of investigations of the DWG file format. Included are specifications for the header, entities, table entries (including layers, linetypes, views, viewports, styles, UCSs, dimension styles, and registered applications), objects, raster images, object maps, and bookkeeping information. The OpenDWG specification is in rich text format.