/usr/include/xalanc/XalanDOM/ is in libxalan-c-dev 1.11-6.
This file is owned by root:root, with mode 0o755.
..
/usr/include/xalanc/XalanDOM/XalanAttr.hpp
/usr/include/xalanc/XalanDOM/XalanCDATASection.hpp
/usr/include/xalanc/XalanDOM/XalanCharacterData.hpp
/usr/include/xalanc/XalanDOM/XalanComment.hpp
/usr/include/xalanc/XalanDOM/XalanDOMDefinitions.hpp
/usr/include/xalanc/XalanDOM/XalanDOMException.hpp
/usr/include/xalanc/XalanDOM/XalanDOMImplementation.hpp
/usr/include/xalanc/XalanDOM/XalanDOMInit.hpp
/usr/include/xalanc/XalanDOM/XalanDOMString.hpp
/usr/include/xalanc/XalanDOM/XalanDocument.hpp
/usr/include/xalanc/XalanDOM/XalanDocumentFragment.hpp
/usr/include/xalanc/XalanDOM/XalanDocumentType.hpp
/usr/include/xalanc/XalanDOM/XalanElement.hpp
/usr/include/xalanc/XalanDOM/XalanEmptyNamedNodeMap.hpp
/usr/include/xalanc/XalanDOM/XalanEntity.hpp
/usr/include/xalanc/XalanDOM/XalanEntityReference.hpp
/usr/include/xalanc/XalanDOM/XalanNamedNodeMap.hpp
/usr/include/xalanc/XalanDOM/XalanNode.hpp
/usr/include/xalanc/XalanDOM/XalanNodeList.hpp
/usr/include/xalanc/XalanDOM/XalanNodeListDummy.hpp
/usr/include/xalanc/XalanDOM/XalanNodeListSurrogate.hpp
/usr/include/xalanc/XalanDOM/XalanNotation.hpp
/usr/include/xalanc/XalanDOM/XalanProcessingInstruction.hpp
/usr/include/xalanc/XalanDOM/XalanText.hpp