/usr/share/opencascade/ is in libopencascade-ocaf-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/XSTEPResource/
/usr/share/opencascade/6.5.0/src/XSTEPResource/IGES
/usr/share/opencascade/6.5.0/src/XSTEPResource/STEP
/usr/share/opencascade/6.5.0/src/XmlOcafResource/
/usr/share/opencascade/6.5.0/src/XmlOcafResource/XmlOcaf.xsd
/usr/share/opencascade/6.5.0/src/XmlOcafResource/XmlOcaf_SmallTypes.xsd
/usr/share/opencascade/6.5.0/src/XmlOcafResource/XmlOcaf_TDF.xsd
/usr/share/opencascade/6.5.0/src/XmlOcafResource/XmlOcaf_TDataStd.xsd
/usr/share/opencascade/6.5.0/src/XmlOcafResource/XmlOcaf_TDataStd_Name.xsd
/usr/share/opencascade/6.5.0/src/XmlOcafResource/XmlOcaf_TDocStd.xsd
/usr/share/opencascade/6.5.0/src/XmlOcafResource/XmlOcaf_TFunction.xsd
/usr/share/opencascade/6.5.0/src/XmlOcafResource/XmlOcaf_TNaming.xsd
/usr/share/opencascade/6.5.0/src/XmlOcafResource/XmlOcaf_TNaming_NamedShape.xsd
/usr/share/opencascade/6.5.0/src/XmlOcafResource/XmlOcaf_TPrsStd.xsd
/usr/share/opencascade/6.5.0/src/XmlOcafResource/XmlXcaf.xsd