--- /dev/null
+// Special file to define and describe the modules (goups)
+
+/**
+ * \defgroup DataModel Data model
+ *
+ * \brief Structures for storage and management the application data.
+ *
+ * Data structures are unified and splitted in universal <b>ModelAPI</b> package.
+ * The OCCT specialized implementation of ModelAPI interfaces is located in the <b>Model</b>.
+ * The geometrical primitives interfaces in <b>GeomAPI</b> package are supported by geometrical
+ * persistence elements in <b>GeomDatAPI</b> interface and has OCCT-specific implementation in GeomData package.
+ *
+ */
+
+/**
+ * \defgroup DataAlgo Algorithms
+ *
+ * \brief Different algorithm used in the application
+ *
+ * The geometrical algorithms implementation (basing on OCCT libraries) are located in <b>GeomAlgoAPI</b>.
+ *
+ */
+
+
+/**
+ * \defgroup Plugins Plugins
+ *
+ * \brief Implementation of specific features of the application is concentrated in plugins.
+ *
+ * The C++ and Python features implementations are located in plugins: specially organized libraries
+ * and configuration files that allows to define the user interface and specific algorithms.
+ * There are many plugins that should be extended with the development of the application. The names
+ * of plugin-packages are ended with "Plugin" string:
+ * <b>PartSetPlugin</b>, <b>ConstructionPlugin</b>, <b>SketchPlugin</b>, <b>FeaturesPlugins</b>, etc.
+ *
+ */
+
+ /**
+ * \defgroup Config Config
+ *
+ * \brief XML processing tools used in the application
+ *
+ * The tools for reading definitions of plugins, features and widgets.
+ *
+ */
+
+/**
+ * \defgroup GUI GUI of the application
+ *
+ * \brief Classes for graphic user interface definition
+ *
+ * Classes of application windows definition, operations launching,
+ * and objects presentations. It consists of two packages:
+ * - ModuleBase - level for modules definition
+ * - XGUI - implementation of Application GUI.
+ */
+
+/**
+ * \defgroup Salome A Salome connector
+ *
+ * \brief A set of classes which provide wrapping of
+ * OpenParts application as SALOME module
+ */
+
+/**
+ * \defgroup Desktop Classes for standalone application
+ *
+ * \brief This group contains classes for launching the application
+ * in standalone desktop (without SALOME)
+ */
+
+/**
+ * \defgroup Modules Modules
+ *
+ * \brief Definition of a module as a set of classes for plugins management
+ */
+
+/**
+ * \defgroup Validators Validators
+ *
+ * \brief Implementation of internal logic of the feature
+ *
+ * Validators are used for checking validity of the feature: each argument,
+ * dependencies between the arguments. Validators are defined in the
+ * configuration files and may be also used for selection filters (ModuleBase_SelectionValidator),
+ * passing configurable parameters from XML file to the feature implementation
+ * (like in ExchangePlugin_ImportFormatValidator).
+ *
+ */
+
