/usr/include/qt5/QtXml/ is in qtbase5-dev 5.2.1+dfsg-1ubuntu14.3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/qt5/QtXml/QDomAttr
/usr/include/qt5/QtXml/QDomCDATASection
/usr/include/qt5/QtXml/QDomCharacterData
/usr/include/qt5/QtXml/QDomComment
/usr/include/qt5/QtXml/QDomDocument
/usr/include/qt5/QtXml/QDomDocumentFragment
/usr/include/qt5/QtXml/QDomDocumentType
/usr/include/qt5/QtXml/QDomElement
/usr/include/qt5/QtXml/QDomEntity
/usr/include/qt5/QtXml/QDomEntityReference
/usr/include/qt5/QtXml/QDomImplementation
/usr/include/qt5/QtXml/QDomNamedNodeMap
/usr/include/qt5/QtXml/QDomNode
/usr/include/qt5/QtXml/QDomNodeList
/usr/include/qt5/QtXml/QDomNotation
/usr/include/qt5/QtXml/QDomProcessingInstruction
/usr/include/qt5/QtXml/QDomText
/usr/include/qt5/QtXml/QXmlAttributes
/usr/include/qt5/QtXml/QXmlContentHandler
/usr/include/qt5/QtXml/QXmlDTDHandler
/usr/include/qt5/QtXml/QXmlDeclHandler
/usr/include/qt5/QtXml/QXmlDefaultHandler
/usr/include/qt5/QtXml/QXmlEntityResolver
/usr/include/qt5/QtXml/QXmlErrorHandler
/usr/include/qt5/QtXml/QXmlInputSource
/usr/include/qt5/QtXml/QXmlLexicalHandler
/usr/include/qt5/QtXml/QXmlLocator
/usr/include/qt5/QtXml/QXmlNamespaceSupport
/usr/include/qt5/QtXml/QXmlParseException
/usr/include/qt5/QtXml/QXmlReader
/usr/include/qt5/QtXml/QXmlSimpleReader
/usr/include/qt5/QtXml/QtXml
/usr/include/qt5/QtXml/QtXmlDepends
/usr/include/qt5/QtXml/QtXmlVersion
/usr/include/qt5/QtXml/qdom.h
/usr/include/qt5/QtXml/qtxmlglobal.h
/usr/include/qt5/QtXml/qtxmlversion.h
/usr/include/qt5/QtXml/qxml.h