Glossary

ACI
AutoCAD Color Index (ACI)
ACIS
The 3D ACIS Modeler (ACIS) is a geometric modeling kernel developed by Spatial Corp. ® (formerly Spatial Technology) and now part of Dassault Systems. All ACIS based DXF entities store their geometry as SAT or SAB data. These are not open data formats and a license has to be purchased to get access to their SDK, therefore ezdxf can not provide any support for creating, processing or transforming of ACIS based DXF entities.
bulge
The Bulge value is used to create arc shaped line segments in Polyline and LWPolyline entities.
CAD
Computer-Assisted Drafting or Computer-Aided Design
CTB
Color dependent plot style table (ColorDependentPlotStyles)
DWG
Proprietary file format of AutoCAD ®. Documentation for this format is available from the Open Design Alliance (ODA) at their Downloads section. This documentation is created by reverse engineering therefore not perfect nor complete.
DXF
Drawing eXchange Format is a file format used by AutoCAD ® to interchange data with other CAD applications. DXF is a trademark of Autodesk ®. See also What is DXF?
raw color
Raw color value as stored in DWG files, this integer value can represent ACI values as well as and true color values
reliable CAD application
CAD applications which create valid DXF documents in the meaning and interpretation of Autodesk. See also What is DXF?
SAB
ACIS file format, data stored as binary data
SAT
ACIS file format, data stored as ASCII text
STB
Named plot style table (NamedPlotStyles)
true color
RGB color representation, a combination red, green and blue values to define a color.