creo3 config.pro option documentation for: INTF3D_OUT_DATUMS_BY_DEFAULT 
intf3d_out_datums_by_default
yes
, no
*
Determines whether datum curves are included when exporting IGES files in Batch mode. This configuration option is available as the Include datums in export
3D data exchange setting in the PTC Creo Parametric Options
dialog box.
yes
- Includes datum curve information.
no
- Does not include datum curve information.