/usr/share/opencascade/ is in libopencascade-ocaf-lite-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/StdResource/
/usr/share/opencascade/6.5.0/src/StdResource/MDTV-Standard.xwd
/usr/share/opencascade/6.5.0/src/StdResource/MigrationSheet.txt
/usr/share/opencascade/6.5.0/src/StdResource/Plugin
/usr/share/opencascade/6.5.0/src/StdResource/Standard
/usr/share/opencascade/6.5.0/src/StdResource/Standard.us
/usr/share/opencascade/6.5.0/src/StdResource/StandardLite
/usr/share/opencascade/6.5.0/src/StdResource/TObj
/usr/share/opencascade/6.5.0/src/StdResource/XCAF
/usr/share/opencascade/6.5.0/src/StdResource/dftree.tcl