/usr/include/xercesc/internal/ is in libxerces-c-dev 3.1.1-5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/xercesc/internal/BinFileOutputStream.hpp
/usr/include/xercesc/internal/BinMemOutputStream.hpp
/usr/include/xercesc/internal/CharTypeTables.hpp
/usr/include/xercesc/internal/DGXMLScanner.hpp
/usr/include/xercesc/internal/ElemStack.hpp
/usr/include/xercesc/internal/EndOfEntityException.hpp
/usr/include/xercesc/internal/IANAEncodings.hpp
/usr/include/xercesc/internal/IGXMLScanner.hpp
/usr/include/xercesc/internal/MemoryManagerImpl.hpp
/usr/include/xercesc/internal/ReaderMgr.hpp
/usr/include/xercesc/internal/SGXMLScanner.hpp
/usr/include/xercesc/internal/ValidationContextImpl.hpp
/usr/include/xercesc/internal/VecAttrListImpl.hpp
/usr/include/xercesc/internal/VecAttributesImpl.hpp
/usr/include/xercesc/internal/WFXMLScanner.hpp
/usr/include/xercesc/internal/XMLInternalErrorHandler.hpp
/usr/include/xercesc/internal/XMLReader.hpp
/usr/include/xercesc/internal/XMLScanner.hpp
/usr/include/xercesc/internal/XMLScannerResolver.hpp
/usr/include/xercesc/internal/XProtoType.hpp
/usr/include/xercesc/internal/XSAXMLScanner.hpp
/usr/include/xercesc/internal/XSObjectFactory.hpp
/usr/include/xercesc/internal/XSerializable.hpp
/usr/include/xercesc/internal/XSerializationException.hpp
/usr/include/xercesc/internal/XSerializeEngine.hpp
/usr/include/xercesc/internal/XTemplateSerializer.hpp