/usr/include/camitk-4.0/libraries/pmlschema/ is in libcamitk-dev 4.0.4-2ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/camitk-4.0/libraries/pmlschema/Atom.hxx
/usr/include/camitk-4.0/libraries/pmlschema/AtomProperties.hxx
/usr/include/camitk-4.0/libraries/pmlschema/AtomRef.hxx
/usr/include/camitk-4.0/libraries/pmlschema/Atoms.hxx
/usr/include/camitk-4.0/libraries/pmlschema/BasicStructuralComponent.hxx
/usr/include/camitk-4.0/libraries/pmlschema/Cell.hxx
/usr/include/camitk-4.0/libraries/pmlschema/CellProperties.hxx
/usr/include/camitk-4.0/libraries/pmlschema/Color.hxx
/usr/include/camitk-4.0/libraries/pmlschema/ColorComponent.hxx
/usr/include/camitk-4.0/libraries/pmlschema/ExclusiveComponent.hxx
/usr/include/camitk-4.0/libraries/pmlschema/GeometricType.hxx
/usr/include/camitk-4.0/libraries/pmlschema/InformativeComponent.hxx
/usr/include/camitk-4.0/libraries/pmlschema/MultiComponent.hxx
/usr/include/camitk-4.0/libraries/pmlschema/NrOfStructures.hxx
/usr/include/camitk-4.0/libraries/pmlschema/PhysicalModel.hxx
/usr/include/camitk-4.0/libraries/pmlschema/RenderingMode.hxx
/usr/include/camitk-4.0/libraries/pmlschema/StructuralComponent.hxx