/usr/include/xsd/cxx/parser/validating/ is in xsdcxx 4.0.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/xsd/cxx/parser/validating/exceptions.hxx
/usr/include/xsd/cxx/parser/validating/exceptions.ixx
/usr/include/xsd/cxx/parser/validating/exceptions.txx
/usr/include/xsd/cxx/parser/validating/inheritance-map.hxx
/usr/include/xsd/cxx/parser/validating/inheritance-map.txx
/usr/include/xsd/cxx/parser/validating/parser.hxx
/usr/include/xsd/cxx/parser/validating/parser.txx
/usr/include/xsd/cxx/parser/validating/xml-schema-pimpl.hxx
/usr/include/xsd/cxx/parser/validating/xml-schema-pimpl.ixx
/usr/include/xsd/cxx/parser/validating/xml-schema-pimpl.txx
/usr/include/xsd/cxx/parser/validating/xml-schema-pskel.hxx
/usr/include/xsd/cxx/parser/validating/xml-schema-pskel.ixx
/usr/include/xsd/cxx/parser/validating/xml-schema-pskel.txx