在将网页加载到QML XmlListModel时出现问题

import QtQuick 1.0

Rectangle {
  Component {
    id: delegate
        Text{text: title}
  }

  ListView {
    y:10
    id: view
    anchors.fill: parent
    model: model
    delegate: delegate
  }


  XmlListModel {
    id:model
    source: \"http://www.w3.org/\"
    query: \"/html/head\"
    namespaceDeclarations: \"declare default element namespace \'www.w3.org/1999/xhtml/\';\"

    XmlRole { name: \"title\"; query: \"title/string()\" }
  }
}