Design Exchange Specification (DES) format describes degree
1 curves Polylines in DES format require less disk space than the
same data in IGES format.
The file structure is as follows:
The
START line indicates the linear units system that is used.
The
HEADER line contains a reference to the Userinfo.
The
SENDING SYSTEM line indicates the type of preprocessor used.
The
LINE indicates the start of a description of edit points for constructing a
first degree line. The parameters are grouped by three and represent
the X,Y and Z coordinates of the points that form the edit point
of the lines. A new description of a line always starts with the
LINE entity, followed by the number of lines, the number of edit
points and a 0 to finish.
The
DES file concludes with a * TERMINATE section.
