- BasisFunction
- BSpline
- BSplineBasisFunction
- DXFAppID
- DXFArc
- DXFBlock
- DXFBlockEnd
- DXFBlockRecord
- DXFCircle
- DXFColor
- DXFContainer
- DXFDatabaseContainer
- DXFDatabaseObject
- DXFDictionary
- DXFDimStyleTable
- DXFDocument
- DXFEllipse
- DXFEntity
- DXFGraphics
- DXFHatch
- DXFHeaderSegment
- DXFHeaderSegmentAutoCAD
- DXFLayer
- DXFLine
- DXFLinetype
- DXFLWPolyline
- DXFObject
- DXFPoint
- DXFSection
- DXFSpline
- DXFStyle
- DXFTable
- DXFTableRecord
- DXFText
- DXFViewport
- RealPoint
- SplineControlPoint