The ubuntu packages seem to be missing all the developer documentation for opencascade. There should be a -doc package. Worse, these aren't even viewable on the opencascade website, you have to download the distribution.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: libopencascade-dev 6.3.0.dfsg.1-6
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
CheckboxSubmission: 1e1a99f31ec2933306456e1f141c45d8
CheckboxSystem: edda5d4f616ca792bf437989cb597002
Date: Mon Jun 27 16:34:32 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
PackageArchitecture: all
ProcEnviron:
LANGUAGE=en_US:en
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: opencascade
UpgradeStatus: No upgrade log present (probably fresh install)
Status changed to 'Confirmed' because the bug affects multiple users.