Hello,
All links to pictures on following pages
https://standards.buildingsmart.org/IFC/DEV/IFC4_3/RC1/HTML/link/ifcopencrossprofiledef.htm
https://standards.buildingsmart.org/IFC/DEV/IFC4_3/RC1/HTML/link/ifcsectionedsurface.htm
are wrong, so no informational pictures can be seen, but they would be very helpful!
Thanks.