Precision::Confusion and Precision::Angular in 5.0?

Hello, i have just installed OCC 5.0 and have tried to compile a OCC 4.0 application. I have changed the lib paths and renamed the relevant dlls. But when i try to compile i get an error about Precision::Confusion and Precision::Angular. Could anyone tell me about the changed made to these classes in OCC 5.0?

Thanks.