Conversion Notes

When exporting Arbortext IsoDraw files, some of the elements will be converted into several CGM elements, since CGM cannot recognize e.g. ellipses with blends. The following table summarizes how the element types are assigned.

Arbortext IsoDraw element	is converted to
Line/polyline	Polyline
Rectangle	Polyline
Polygon	Polyline
Ellipse	Elliptical Arc
	POLYLINE (for blends)
Bézier path	POLYBÉZIER, POLYGON or POLYLINE
Inner thread	As several ellipses
Outer thread	As several ellipses
Marker	No conversion
Text	Text POLYGON / ELLIPSE (text background)
Image element	Cell array TILE RASTER ARRAY (if possible)
Group	grobject (if possible)
Callout,consisting of individual elements. These can be: Text, line, polygon, rectangle, ellipse. The conversion of the individual elements corresponds to the Arbortext IsoDraw elements listed.

Our CGM filters are subject to continuous testing. We respond immediately to modifications in the standards and profiles of the generation we are actively helping to develop. There are only few details in CGM, which Arbortext IsoDraw does not support. If you come across one of these details or detect any other error, we would be grateful if you could let us know.

For in-house testing purposes, we use the test suite prepared by NIST (National Institute of Science and Technology, http://www.nist.gov/cgm). We recommend the use of MetaCheck, which is used by all CGM specialists, as a syntax-checking program.