| QAccel | Handles keyboard accelerator and shortcut keys | 
| QAccessible | Enums and static functions relating to accessibility | 
| QAccessibleInterface | Defines an interface that exposes information about accessible objects | 
| QAccessibleObject | Implements parts of the QAccessibleInterface for QObjects | 
| QAction | Abstract user interface action that can appear both in menus and tool bars | 
| QActionGroup | Groups actions together | 
| QApplication | Manages the GUI application's control flow and main settings | 
| QAsciiCache | Template class that provides a cache based on char* keys | 
| QAsciiCacheIterator | Iterator for QAsciiCache collections | 
| QAsciiDict | Template class that provides a dictionary based on char* keys | 
| QAsciiDictIterator | Iterator for QAsciiDict collections | 
| QAssistantClient | Means of using Qt Assistant as an application's help tool | 
| QAxAggregated | Abstract base class for implementations of additional COM interfaces | 
| QAxBase | Abstract class that provides an API to initalize and access a COM object | 
| QAxBindable | Interface between a QWidget and an ActiveX client | 
| QAxFactory | Defines a factory for the creation of COM components | 
| QAxObject | QObject that wraps a COM object | 
| QAxScript | Wrapper around script code | 
| QAxScriptEngine | Wrapper around a script engine | 
| QAxScriptManager | Bridge between application objects and script code | 
| QAxWidget | QWidget that wraps an ActiveX control | 
| QBig5Codec | Conversion to and from the Big5 encoding | 
| QBig5hkscsCodec | Conversion to and from the Big5-HKSCS encoding | 
| QBitArray | Array of bits | 
| QBitVal | Internal class, used with QBitArray | 
| QBitmap | Monochrome (1-bit depth) pixmaps | 
| QBoxLayout | Lines up child widgets horizontally or vertically | 
| QBrush | Defines the fill pattern of shapes drawn by a QPainter | 
| QBuffer | I/O device that operates on a QByteArray | 
| QButton | The abstract base class of button widgets, providing functionality common to buttons | 
| QButtonGroup | Organizes QButton widgets in a group | 
| QByteArray | Array of bytes | 
| QCDEStyle | CDE look and feel | 
| QCString | Abstraction of the classic C zero-terminated char array (char *) | 
| QCache | Template class that provides a cache based on QString keys | 
| QCacheIterator | Iterator for QCache collections | 
| QCanvas | 2D area that can contain QCanvasItem objects | 
| QCanvasEllipse | Ellipse or ellipse segment on a QCanvas | 
| QCanvasItem | Abstract graphic object on a QCanvas | 
| QCanvasItemList | List of QCanvasItems | 
| QCanvasLine | Line on a QCanvas | 
| QCanvasPixmap | Pixmaps for QCanvasSprites | 
| QCanvasPixmapArray | Array of QCanvasPixmaps | 
| QCanvasPolygon | Polygon on a QCanvas | 
| QCanvasPolygonalItem | Polygonal canvas item on a QCanvas | 
| QCanvasRectangle | Rectangle on a QCanvas | 
| QCanvasSpline | Multi-bezier splines on a QCanvas | 
| QCanvasSprite | Animated canvas item on a QCanvas | 
| QCanvasText | Text object on a QCanvas | 
| QCanvasView | On-screen view of a QCanvas | 
| QChar | Lightweight Unicode character | 
| QCharRef | Helper class for QString | 
| QCheckBox | Checkbox with a text label | 
| QCheckListItem | Checkable list view items | 
| QCheckTableItem | Checkboxes in QTables | 
| QChildEvent | Event parameters for child object events | 
| QClipboard | Access to the window system clipboard | 
| QCloseEvent | Parameters that describe a close event | 
| QColor | Colors based on RGB or HSV values | 
| QColorDialog | Dialog widget for specifying colors | 
| QColorDrag | Drag and drop object for transferring colors | 
| QColorGroup | Group of widget colors | 
| QComboBox | Combined button and popup list | 
| QComboTableItem | Means of using comboboxes in QTables | 
| QCommonStyle | Encapsulates the common Look and Feel of a GUI | 
| QConstString | String objects using constant Unicode data | 
| QContextMenuEvent | Parameters that describe a context menu event | 
| QCopChannel | Communication capabilities between several clients | 
| QCursor | Mouse cursor with an arbitrary shape | 
| QCustomEvent | Support for custom events | 
| QCustomMenuItem | Abstract base class for custom menu items in popup menus | 
| QDataBrowser | Data manipulation and navigation for data entry forms | 
| QDataStream | Serialization of binary data to a QIODevice | 
| QDataTable | Flexible SQL table widget that supports browsing and editing | 
| QDataView | Read-only SQL forms | 
| QDate | Date functions | 
| QDateEdit | Date editor | 
| QDateTime | Date and time functions | 
| QDateTimeEdit | Combines a QDateEdit and QTimeEdit widget into a single widget for editing datetimes | 
| QDateTimeEditBase | Abstraction for date and edit editors | 
| QDeepCopy | Template class which ensures that implicitly shared and explicitly shared classes reference unique data | 
| QDesktopWidget | Access to screen information on multi-head systems | 
| QDial | Rounded range control (like a speedometer or potentiometer) | 
| QDialog | The base class of dialog windows | 
| QDict | Template class that provides a dictionary based on QString keys | 
| QDictIterator | Iterator for QDict collections | 
| QDir | Access to directory structures and their contents in a platform-independent way | 
| QDirectPainter | Direct access to the video hardware | 
| QDns | Asynchronous DNS lookups | 
| QDockArea | Manages and lays out QDockWindows | 
| QDockWindow | Widget which can be docked inside a QDockArea or floated as a top level window on the desktop | 
| QDomAttr | Represents one attribute of a QDomElement | 
| QDomCDATASection | Represents an XML CDATA section | 
| QDomCharacterData | Represents a generic string in the DOM | 
| QDomComment | Represents an XML comment | 
| QDomDocument | Represents an XML document | 
| QDomDocumentFragment | Tree of QDomNodes which is not usually a complete QDomDocument | 
| QDomDocumentType | The representation of the DTD in the document tree | 
| QDomElement | Represents one element in the DOM tree | 
| QDomEntity | Represents an XML entity | 
| QDomEntityReference | Represents an XML entity reference | 
| QDomImplementation | Information about the features of the DOM implementation | 
| QDomNamedNodeMap | Collection of nodes that can be accessed by name | 
| QDomNode | The base class for all the nodes in a DOM tree | 
| QDomNodeList | List of QDomNode objects | 
| QDomNotation | Represents an XML notation | 
| QDomProcessingInstruction | Represents an XML processing instruction | 
| QDomText | Represents text data in the parsed XML document | 
| QDoubleValidator | Range checking of floating-point numbers | 
| QDragEnterEvent | Event which is sent to the widget when a drag and drop first drags onto the widget | 
| QDragLeaveEvent | Event which is sent to the widget when a drag and drop leaves the widget | 
| QDragMoveEvent | Event which is sent while a drag and drop is in progress | 
| QDragObject | Encapsulates MIME-based data transfer | 
| QDropEvent | Event which is sent when a drag and drop is completed | 
| QEditorFactory | Used to create editor widgets for QVariant data types | 
| QErrorMessage | Error message display dialog | 
| QEucJpCodec | Conversion to and from EUC-JP character sets | 
| QEucKrCodec | Conversion to and from EUC-KR character sets | 
| QEvent | The base class of all event classes. Event objects contain event parameters | 
| QEventLoop | Manages the event queue | 
| QFile | I/O device that operates on files | 
| QFileDialog | Dialogs that allow users to select files or directories | 
| QFileIconProvider | Icons for QFileDialog to use | 
| QFileInfo | System-independent file information | 
| QFilePreview | File previewing in QFileDialog | 
| QFocusData | Maintains the list of widgets in the focus chain | 
| QFocusEvent | Event parameters for widget focus events | 
| QFont | Font used for drawing text | 
| QFontDatabase | Information about the fonts available in the underlying window system | 
| QFontDialog | Dialog widget for selecting a font | 
| QFontInfo | General information about fonts | 
| QFontManager | Implements font management in Qt/Embedded | 
| QFontMetrics | Font metrics information | 
| QFrame | The base class of widgets that can have a frame | 
| QFtp | Implementation of the FTP protocol | 
| QGL | Namespace for miscellaneous identifiers in the Qt OpenGL module | 
| QGLColormap | Used for installing custom colormaps into QGLWidgets | 
| QGLContext | Encapsulates an OpenGL rendering context | 
| QGLFormat | The display format of an OpenGL rendering context | 
| QGLWidget | Widget for rendering OpenGL graphics | 
| QGLayoutIterator | Abstract base class of internal layout iterators | 
| QGb18030Codec | Conversion to and from the Chinese GB18030/GBK/GB2312 encoding | 
| QGb2312Codec | Conversion to and from the Chinese GB2312 encoding | 
| QGbkCodec | Conversion to and from the Chinese GBK encoding | 
| QGfxDriverFactory | Creates QScreen objects for Qt/Embedded | 
| QGfxDriverPlugin | Abstract base for Qt/Embedded graphics driver plugins | 
| QGrid | Simple geometry management of its children | 
| QGridLayout | Lays out widgets in a grid | 
| QGridView | Abstract base for fixed-size grids | 
| QGroupBox | Group box frame with a title | 
| QGuardedPtr | Template class that provides guarded pointers to QObjects | 
| QHBox | Horizontal geometry management for its child widgets | 
| QHBoxLayout | Lines up widgets horizontally | 
| QHButtonGroup | Organizes QButton widgets in a group with one horizontal row | 
| QHGroupBox | Organizes widgets in a group with one horizontal row | 
| QHeader | Header row or column, e.g. for tables and listviews | 
| QHebrewCodec | Conversion to and from visually ordered Hebrew | 
| QHideEvent | Event which is sent after a widget is hidden | 
| QHostAddress | IP address | 
| QHttp | Implementation of the HTTP protocol | 
| QHttpHeader | Header information for HTTP | 
| QHttpRequestHeader | Request header information for HTTP | 
| QHttpResponseHeader | Response header information for HTTP | 
| QIMEvent | Parameters for input method events | 
| QIODevice | The base class of I/O devices | 
| QIconDrag | Supports drag and drop operations within a QIconView | 
| QIconDragEvent | Signals that a main icon drag has begun | 
| QIconDragItem | Encapsulates a drag item | 
| QIconFactory | Used to create pixmaps for a QIconSet | 
| QIconSet | Set of icons with different styles and sizes | 
| QIconView | Area with movable labelled icons | 
| QIconViewItem | Single item in a QIconView | 
| QImage | Hardware-independent pixmap representation with direct access to the pixel data | 
| QImageConsumer | Abstraction used by QImageDecoder | 
| QImageDecoder | Incremental image decoder for all supported image formats | 
| QImageDrag | Drag and drop object for transferring images | 
| QImageFormat | Incremental image decoder for a specific image format | 
| QImageFormatPlugin | Abstract base for custom image format plugins | 
| QImageFormatType | Factory that makes QImageFormat objects | 
| QImageIO | Parameters for loading and saving images | 
| QInputDialog | Simple convenience dialog to get a single value from the user | 
| QIntCache | Template class that provides a cache based on long keys | 
| QIntCacheIterator | Iterator for QIntCache collections | 
| QIntDict | Template class that provides a dictionary based on long keys | 
| QIntDictIterator | Iterator for QIntDict collections | 
| QIntValidator | Validator which ensures that a string contains a valid integer within a specified range | 
| QJisCodec | Conversion to and from JIS character sets | 
| QKbdDriverFactory | Creates QWSKeyboardHandler objects for Qt/Embedded | 
| QKbdDriverPlugin | Abstract base for Qt/Embedded keyboard driver plugins | 
| QKeyEvent | Describes a key event | 
| QKeySequence | Encapsulates a key sequence as used by accelerators | 
| QLCDNumber | Displays a number with LCD-like digits | 
| QLabel | Text or image display | 
| QLayout | The base class of geometry managers | 
| QLayoutItem | Abstract item that a QLayout manipulates | 
| QLayoutIterator | Iterators over QLayoutItem | 
| QLibrary | Wrapper for handling shared libraries | 
| QLineEdit | One-line text editor | 
| QListBox | List of selectable, read-only items | 
| QListBoxItem | The base class of all list box items | 
| QListBoxPixmap | List box items with a pixmap and optional text | 
| QListBoxText | List box items that display text | 
| QListView | Implements a list/tree view | 
| QListViewItem | Implements a list view item | 
| QListViewItemIterator | Iterator for collections of QListViewItems | 
| QLocalFs | Implementation of a QNetworkProtocol that works on the local file system | 
| QLocale | Converts between numbers and their string representations in various languages | 
| QMacMime | Maps open-standard MIME to Mac flavors | 
| QMacStyle | Implements an Appearance Manager style | 
| QMainWindow | Main application window, with a menu bar, dock windows (e.g. for toolbars), and a status bar | 
| QMap | Value-based template class that provides a dictionary | 
| QMapConstIterator | Iterator for QMap | 
| QMapIterator | Iterator for QMap | 
| QMemArray | Template class that provides arrays of simple types | 
| QMenuBar | Horizontal menu bar | 
| QMenuData | Base class for QMenuBar and QPopupMenu | 
| QMessageBox | Modal dialog with a short message, an icon, and some buttons | 
| QMetaObject | Meta information about Qt objects | 
| QMetaProperty | Stores meta data about a property | 
| QMimeSource | Abstraction of objects which provide formatted data of a certain MIME type | 
| QMimeSourceFactory | Extensible provider of mime-typed data | 
| QMotif | The basis of the Motif Extension | 
| QMotifDialog | The QDialog API for Motif-based dialogs | 
| QMotifPlusStyle | More sophisticated Motif-ish look and feel | 
| QMotifStyle | Motif look and feel | 
| QMotifWidget | The QWidget API for Xt/Motif widgets | 
| QMouseDriverFactory | Creates QWSMouseHandler objects for Qt/Embedded | 
| QMouseDriverPlugin | Abstract base for Qt/Embedded mouse driver plugins | 
| QMouseEvent | Parameters that describe a mouse event | 
| QMoveEvent | Event parameters for move events | 
| QMovie | Incremental loading of animations or images, signalling as it progresses | 
| QMutex | Access serialization between threads | 
| QMutexLocker | Simplifies locking and unlocking QMutexes | 
| QNPInstance | QObject that is a web browser plugin | 
| QNPStream | Stream of data provided to a QNPInstance by the browser | 
| QNPWidget | QWidget that is a web browser plugin window | 
| QNPlugin | The main factory for plugin objects | 
| QNetworkOperation | Common operations for network protocols | 
| QNetworkProtocol | Common API for network protocols | 
| QObject | The base class of all Qt objects | 
| QObjectCleanupHandler | Watches the lifetime of multiple QObjects | 
| QObjectList | QPtrList of QObjects | 
| QObjectListIterator | Iterator for QObjectLists | 
| QPNGImagePacker | Creates well-compressed PNG animations | 
| QPaintDevice | The base class of objects that can be painted | 
| QPaintDeviceMetrics | Information about a paint device | 
| QPaintEvent | Event parameters for paint events | 
| QPainter | Does low-level painting e.g. on widgets | 
| QPair | Value-based template class that provides a pair of elements | 
| QPalette | Color groups for each widget state | 
| QPen | Defines how a QPainter should draw lines and outlines of shapes | 
| QPicture | Paint device that records and replays QPainter commands | 
| QPixmap | Off-screen, pixel-based paint device | 
| QPixmapCache | Application-global cache for pixmaps | 
| QPlatinumStyle | Mac/Platinum look and feel | 
| QPoint | Defines a point in the plane | 
| QPointArray | Array of points | 
| QPopupMenu | Popup menu widget | 
| QPrinter | Paint device that paints on a printer | 
| QProcess | Used to start external programs and to communicate with them | 
| QProgressBar | Horizontal progress bar | 
| QProgressDialog | Feedback on the progress of a slow operation | 
| QPtrCollection | The base class of most pointer-based Qt collections | 
| QPtrDict | Template class that provides a dictionary based on void* keys | 
| QPtrDictIterator | Iterator for QPtrDict collections | 
| QPtrList | Template class that provides a list | 
| QPtrListIterator | Iterator for QPtrList collections | 
| QPtrQueue | Template class that provides a queue | 
| QPtrStack | Template class that provides a stack | 
| QPtrVector | Template collection class that provides a vector (array) | 
| QPushButton | Command button | 
| QRadioButton | Radio button with a text or pixmap label | 
| QRangeControl | Integer value within a range | 
| QRect | Defines a rectangle in the plane | 
| QRegExp | Pattern matching using regular expressions | 
| QRegExpValidator | Used to check a string against a regular expression | 
| QRegion | Clip region for a painter | 
| QResizeEvent | Event parameters for resize events | 
| QSGIStyle | SGI/Irix look and feel | 
| QScreen | And its descendants manage the framebuffer and palette | 
| QScrollBar | Vertical or horizontal scroll bar | 
| QScrollView | Scrolling area with on-demand scroll bars | 
| QSemaphore | Robust integer semaphore | 
| QServerSocket | TCP-based server | 
| QSessionManager | Access to the session manager | 
| QSettings | Persistent platform-independent application settings | 
| QShowEvent | Event which is sent when a widget is shown | 
| QSignal | Can be used to send signals for classes that don't inherit QObject | 
| QSignalMapper | Bundles signals from identifiable senders | 
| QSimpleRichText | Small displayable piece of rich text | 
| QSize | Defines the size of a two-dimensional object | 
| QSizeGrip | Corner-grip for resizing a top-level window | 
| QSizePolicy | Layout attribute describing horizontal and vertical resizing policy | 
| QSjisCodec | Conversion to and from Shift-JIS | 
| QSlider | Vertical or horizontal slider | 
| QSocket | Buffered TCP connection | 
| QSocketDevice | Platform-independent low-level socket API | 
| QSocketNotifier | Support for socket callbacks | 
| QSound | Access to the platform audio facilities | 
| QSpacerItem | Blank space in a layout | 
| QSpinBox | Spin box widget (spin button) | 
| QSplashScreen | Splash screen that can be shown during application startup | 
| QSplitter | Implements a splitter widget | 
| QSql | Namespace for Qt SQL identifiers that need to be global-like | 
| QSqlCursor | Browsing and editing of SQL tables and views | 
| QSqlDatabase | Used to create SQL database connections and to provide transaction handling | 
| QSqlDriver | Abstract base class for accessing SQL databases | 
| QSqlDriverPlugin | Abstract base for custom QSqlDriver plugins | 
| QSqlEditorFactory | Used to create the editors used by QDataTable and QSqlForm | 
| QSqlError | SQL database error information | 
| QSqlField | Manipulates the fields in SQL database tables and views | 
| QSqlFieldInfo | Stores meta data associated with a SQL field | 
| QSqlForm | Creates and manages data entry forms tied to SQL databases | 
| QSqlIndex | Functions to manipulate and describe QSqlCursor and QSqlDatabase indexes | 
| QSqlPropertyMap | Used to map widgets to SQL fields | 
| QSqlQuery | Means of executing and manipulating SQL statements | 
| QSqlRecord | Encapsulates a database record, i.e. a set of database fields | 
| QSqlRecordInfo | Encapsulates a set of database field meta data | 
| QSqlResult | Abstract interface for accessing data from SQL databases | 
| QSqlSelectCursor | Browsing of general SQL SELECT statements | 
| QStatusBar | Horizontal bar suitable for presenting status information | 
| QStoredDrag | Simple stored-value drag object for arbitrary MIME data | 
| QStrIList | Doubly-linked list of char* with case-insensitive comparison | 
| QStrList | Doubly-linked list of char* | 
| QStrListIterator | Iterator for the QStrList and QStrIList classes | 
| QString | Abstraction of Unicode text and the classic C '\0'-terminated char array | 
| QStringList | List of strings | 
| QStyle | The look and feel of a GUI | 
| QStyleFactory | Creates QStyle objects | 
| QStyleOption | Optional parameters for QStyle functions | 
| QStylePlugin | Abstract base for custom QStyle plugins | 
| QStyleSheet | Collection of styles for rich text rendering and a generator of tags | 
| QStyleSheetItem | Encapsulation of a set of text styles | 
| QSyntaxHighlighter | Base class for implementing QTextEdit syntax highlighters | 
| QTab | The structures in a QTabBar | 
| QTabBar | Tab bar, e.g. for use in tabbed dialogs | 
| QTabDialog | Stack of tabbed widgets | 
| QTabWidget | Stack of tabbed widgets | 
| QTable | Flexible editable table widget | 
| QTableItem | The cell content for QTable cells | 
| QTableSelection | Access to a selected area in a QTable | 
| QTabletEvent | Parameters that describe a Tablet event | 
| QTextBrowser | Rich text browser with hypertext navigation | 
| QTextCodec | Conversion between text encodings | 
| QTextCodecPlugin | Abstract base for custom QTextCodec plugins | 
| QTextDecoder | State-based decoder | 
| QTextDrag | Drag and drop object for transferring plain and Unicode text | 
| QTextEdit | Powerful single-page rich text editor | 
| QTextEncoder | State-based encoder | 
| QTextIStream | Convenience class for input streams | 
| QTextOStream | Convenience class for output streams | 
| QTextStream | Basic functions for reading and writing text using a QIODevice | 
| QThread | Platform-independent threads | 
| QThreadStorage | Per-thread data storage | 
| QTime | Clock time functions | 
| QTimeEdit | Time editor | 
| QTimer | Timer signals and single-shot timers | 
| QTimerEvent | Parameters that describe a timer event | 
| QToolBar | Movable panel containing widgets such as tool buttons | 
| QToolBox | Column of tabbed widget items | 
| QToolButton | Quick-access button to commands or options, usually used inside a QToolBar | 
| QToolTip | Tool tips (balloon help) for any widget or rectangular part of a widget | 
| QToolTipGroup | Collects tool tips into related groups | 
| QTranslator | Internationalization support for text output | 
| QTranslatorMessage | Translator message and its properties | 
| QTsciiCodec | Conversion to and from the Tamil TSCII encoding | 
| QUriDrag | Drag object for a list of URI references | 
| QUrl | URL parser and simplifies working with URLs | 
| QUrlInfo | Stores information about URLs | 
| QUrlOperator | Common operations on URLs | 
| QUuid | Defines a Universally Unique Identifier (UUID) | 
| QVBox | Vertical geometry management of its child widgets | 
| QVBoxLayout | Lines up widgets vertically | 
| QVButtonGroup | Organizes QButton widgets in a vertical column | 
| QVGroupBox | Organizes a group of widgets in a vertical column | 
| QValidator | Validation of input text | 
| QValueList | Value-based template class that provides lists | 
| QValueListConstIterator | Const iterator for QValueList | 
| QValueListIterator | Iterator for QValueList | 
| QValueStack | Value-based template class that provides a stack | 
| QValueVector | Value-based template class that provides a dynamic array | 
| QVariant | Acts like a union for the most common Qt data types | 
| QWMatrix | 2D transformations of a coordinate system | 
| QWSDecoration | Allows the appearance of the Qt/Embedded Window Manager to be customized | 
| QWSInputMethod | International input methods for Qt/Embedded | 
| QWSKeyboardHandler | Implements the keyboard driver for Qt/Embedded | 
| QWSMouseHandler | Mouse driver for Qt/Embedded | 
| QWSServer | Server-specific functionality in Qt/Embedded | 
| QWSWindow | Server-specific functionality in Qt/Embedded | 
| QWaitCondition | Allows waiting/waking for conditions between threads | 
| QWhatsThis | Simple description of any widget, i.e. answering the question "What's this?" | 
| QWheelEvent | Parameters that describe a wheel event | 
| QWidget | The base class of all user interface objects | 
| QWidgetFactory | For the dynamic creation of widgets from Qt Designer .ui files | 
| QWidgetItem | Layout item that represents a widget | 
| QWidgetPlugin | Abstract base for custom QWidget plugins | 
| QWidgetStack | Stack of widgets of which only the top widget is user-visible | 
| QWindowsMime | Maps open-standard MIME to Window Clipboard formats | 
| QWindowsStyle | Microsoft Windows-like look and feel | 
| QWizard | Framework for wizard dialogs | 
| QWorkspace | Workspace window that can contain decorated windows, e.g. for MDI | 
| QXmlAttributes | XML attributes | 
| QXmlContentHandler | Interface to report the logical content of XML data | 
| QXmlDTDHandler | Interface to report DTD content of XML data | 
| QXmlDeclHandler | Interface to report declaration content of XML data | 
| QXmlDefaultHandler | Default implementation of all the XML handler classes | 
| QXmlEntityResolver | Interface to resolve external entities contained in XML data | 
| QXmlErrorHandler | Interface to report errors in XML data | 
| QXmlInputSource | The input data for the QXmlReader subclasses | 
| QXmlLexicalHandler | Interface to report the lexical content of XML data | 
| QXmlLocator | The XML handler classes with information about the parsing position within a file | 
| QXmlNamespaceSupport | Helper class for XML readers which want to include namespace support | 
| QXmlParseException | Used to report errors with the QXmlErrorHandler interface | 
| QXmlReader | Interface for XML readers (i.e. parsers) | 
| QXmlSimpleReader | Implementation of a simple XML reader (parser) | 
| Qt | Namespace for miscellaneous identifiers that need to be global-like |