/usr/include/xalanc/XalanSourceTree/ is in libxalan110-dev 1.10-6.
This file is owned by root:root, with mode 0o755.
..
/usr/include/xalanc/XalanSourceTree/FormatterToSourceTree.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeAttr.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeAttrNS.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeAttributeAllocator.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeAttributeNSAllocator.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeComment.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeCommentAllocator.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeContentHandler.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeDOMSupport.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeDefinitions.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeDocument.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeDocumentFragment.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeElement.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeElementA.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeElementAAllocator.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeElementANS.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeElementANSAllocator.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeElementNA.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeElementNAAllocator.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeElementNANS.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeElementNANSAllocator.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeHelper.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeInit.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeParserLiaison.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeProcessingInstruction.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeProcessingInstructionAllocator.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeText.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeTextAllocator.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeTextIWS.hpp
/usr/include/xalanc/XalanSourceTree/XalanSourceTreeTextIWSAllocator.hpp