as MODTK_WANTLIB already includes it).
OCE is a C++ 3D modeling library. It can be used to develop CAD/CAM softwares,
for instance FreeCad or IfcOpenShell.
OCE stands for opencascade community edition. This project aims at gathering
patches/ changes/ improvements from the OCC community. Official OCCT
documentation and sources are available at http://www.opencascade.org/, you can
also check their development portal at http://dev.opencascade.org.
