Exporting CALS-compliant IGES Files

CALS is an acronym for the United States Department of Defense Computer-aided Acquisition and Logistic Support initiative. The goal of CALS is to integrate and standardize the digital data received from Department of Defense suppliers. The CALS IGES specification is a series of different classes of IGES files. Each class is a subset of the IGES entity types, as specified in MIL-D-28000A.

CALS Class	Settings File	For the Exchange of
I. 2D Technical Illustration	“cals1.sfo”	2D figures and illustrations normally found in technical publications
II. 3D Engineering Drawings	“cals2.sfo”	3D engineering drawings (export settings are very close to default IGES export settings)

Settings files for CALS support

The “cals1.sfo” and “cals2.sfo” export settings files specify export settings as follows:

Setting	CALS Class I “cals1.sfo”	CALS Class II “cals2.sfo”
Start Section File	“cals1.ssf” template for CALS Class I start section	“cals2.ssf” template for CALS Class II start section
Flattening	On from the Top see footnote 134	Off
Standard Colors	On see footnote 135	Off
Default Drawing see footnote 136	On	On
Excluded Entities (see (IGES Export) Exclude IGES Entities dialog box and (Import IGES) Exclude IGES Entities dialog box)	All entities not in CALS Class I specification are excluded.	No entities are excluded.
Fonts (see Font Text Style Mapping dialog box and (Export IGES) Text Fonts dialog box and (Import IGES) Text Fonts dialog box.)	All MicroStation fonts are mapped to IGES fonts 1, 1001, and 1002, which are the only fonts allowed in CALS Class I IGES files.	All MicroStation fonts are mapped to IGES fonts 1, 1001, 1002, and 1003, which are the only fonts allowed in CALS Class II IGES files.
Level Placement (see Settings menu > Levels… and (IGES Export) Levels dialog box and (Import IGES) Levels dialog box.)	All elements in the DGN file are placed on level 0 in the IGES file.	Elements are left on the same levels as in the DGN file.

“Cals1.sfo” or “cals2.sfo” can be customized. After you have changed the export settings, you can save your changes by choosing File > Settings File > Save As… from the Export IGES File dialog box.

To export CALS Class I-compliant IGES files

Attach the export settings file “cals1.sfo.”
As necessary, see the procedure To attach a settings file other than the default.

In the Export IGES File dialog box, fill in the Product Name field.
The product name is required in CALS Class I IGES files.

From the menu bar of the Export IGES File dialog box, choose Settings > Start Section.

In the Start Section dialog box, type the information specific to your project.


These 2D entities are allowed in CALS Class I IGES files.

To close the Start Settings dialog box, click Done.

To export the file and close the Export IGES File dialog box, click Export.

For more information about saving a custom start section file for your project or organization, see the Import IGES File dialog box.

To export CALS Class II-compliant IGES files

Attach the export settings file “cals2.sfo.”
As necessary, see the procedure To attach a settings file other than the default .

In the Export IGES File dialog box, fill in the Author, Organization, and Product Name fields.
These are required in CALS Class II IGES files.

From the menu bar of the Export IGES File dialog box, choose Settings > Start Section.

In the Start Section dialog box, type the information specific to your project.


These 3D entities are allowed in CALS Class II IGES files.

To close the Start Settings dialog box, click Done.

To export the file and close the Export IGES File dialog box, click Export.