Tailor Made Software Copyright 1993 by Scott Taylor . Reprinted with permission.
Routines are available to both read and write IGES files.
However, any manipulation of the IGES file is up to the user. The 'xxx' indicates an IGES Entity Type Number. These are 'mid-level' routines. The user can modify the processing of defaulted data fields in the individual entity routines as appropriate. Additional sets of routines are used internally but the user does not have to deal with these.