Converting MicroStation Elements to IGES Entities

When you export a DGN file, MicroStation elements (left) are translated to the related IGES entities (right) unless the IGES entity is excluded (see Excluding IGES entities).

MicroStation Element	IGES Entity
1. Cell Library Header	308. Subfigure Definition
2. Cell Headers	408. Subfigure Instance
3. Line	110. Line
4. Line String	106. Copious Data
5. Group Data	Ignored
Saved View	410. View
Color Table	314. Color Definition
6. Shape	106. Copious Data
7. Text Node	212. General Note
11. Curve	126. Rational B-spline Curve
12. Complex Chain	102. Composite Curve
14. Complex Shape, if bounded	144. Trimmed Surface
15. Ellipse	100. Arc (Circles only) 104. Conic
16. Arc	100. Arc (Circles only) 104. Conic
17. Text	212. General Note
18. Surface of Revolution	120. Surface of Revolution
Surface of Projection	118. Ruled Surface
19. Solid of Revolution	128. Solid of Revolution
Solid of Projection	118. Ruled Surface
21. B-spline Pole	Exported with B-spline Curve or B-spline Surface header
22. Point String	116. Point(s)
23. Cone	128. Rational B-spline Surface
24. B-spline Surface Header If not bounded If bounded	128. Rational B-spline Surface 144. Trimmed Surface
25. B-spline Surface Boundary	142. Curve On A Parametric Surface
26. B-spline Knot	Exported with B-spline Curve or B-spline Surface header
27. B-spline Curve	126. Rational B-spline Curve
28. B-spline Weight Factor	Exported with B-spline Curve or B-spline Surface Header
33. Dimension	Dimension or primitive elements, such as line and text see footnote 159
34. Shared Cell Definition	308. Subfigure Definition
35. Shared Cell Instance	408. Subfigure Instance
36. Multi-line^a	Exported as primitive components
37. Tag	Text
66. MicroStation Application	Ignored
87. Raster Header	Ignored
88. Raster Data	Ignored