/usr/share/opencascade/ is in libopencascade-foundation-6.5.0 6.5.0.dfsg-2build1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/opencascade/6.5.0/
/usr/share/opencascade/6.5.0/src/
/usr/share/opencascade/6.5.0/src/OS/
/usr/share/opencascade/6.5.0/src/OS/ApplicationFramework.tcl
/usr/share/opencascade/6.5.0/src/OS/DataExchange.tcl
/usr/share/opencascade/6.5.0/src/OS/Draw.tcl
/usr/share/opencascade/6.5.0/src/OS/FoundationClasses.tcl
/usr/share/opencascade/6.5.0/src/OS/ModelingAlgorithms.tcl
/usr/share/opencascade/6.5.0/src/OS/ModelingData.tcl
/usr/share/opencascade/6.5.0/src/OS/Modules.tcl
/usr/share/opencascade/6.5.0/src/OS/Visualization.tcl
/usr/share/opencascade/6.5.0/src/UnitsAPI/
/usr/share/opencascade/6.5.0/src/UnitsAPI/CurrentUnits
/usr/share/opencascade/6.5.0/src/UnitsAPI/Lexi_Expr.dat
/usr/share/opencascade/6.5.0/src/UnitsAPI/MDTVBaseUnits
/usr/share/opencascade/6.5.0/src/UnitsAPI/MDTVCurrentUnits
/usr/share/opencascade/6.5.0/src/UnitsAPI/Units.dat
/usr/share/opencascade/6.5.0/src/UnitsAPI/UnitsAPI.cdl
/usr/share/opencascade/6.5.0/src/UnitsAPI/UnitsAPI.cxx