History_Item {
      title : str default "Untitled";
      url : str default "about:blank";
      visit : uint ;
      favicon: image compress 95;	// compression ranges from 0 (no compression) to 9 (max compression)
}
Bookmark_Item {
      title : str;
      url : str;
      visit_count : uint;
      last_visit : uint;
      favicon: image compress 95;
}
History_Bookmark_Item {
      version : uint;
      history_entries : list of History_Item;
      bookmark_entries : list of Bookmark_Item;
}