/**
 * \mainpage The Open Graph Drawing Framework
 *
 * \section sec_intro Introduction
 * The Open Graph Drawing Framework (OGDF) is a C++ library containing
 * implementations of various graph drawing algorithms. The library is self
 * contained; optionally, additional packages like LP-solvers are required
 * for some implementations.
 *
 * Here, you find the library's documentation. For more general information
 * on OGDF see http://www.ogdf.net. There, you can also find further explanations,
 * how-tos, and example code.
 *
 * \section sec_overview Overview
 *
 * - \subpage getting-started
 *   <br>Contains information how to build OGDF, how to port code to a more recent version of OGDF, etc.
 *
 * - \subpage examples
 *
 * - \ref basic
 *   <br>Contains basic general classes and functions for \ref random "random numbers", \ref date-time "date and time",
 *   \ref file-system "file and directory handling", fundamental classes and concepts like \ref exceptions "exception handling"
 *   and \ref comparer "comparer", as well as system-specific functionality like \ref threads "multi-threading support" and
 *   access to information on \ref system "system and configuration".
 *   There are also some \ref macros "noteworthy macros" for developers.
 *
 * - \ref graphs
 *   <br>Contains classes for representing graphs and combinatorial embeddings, as well as \ref graph-containers "containers"
 *   associated with them (e.g., node arrays), functionality for writing graphs in various file (and graphics) formats (see class ogdf::GraphIO),
 *   and \ref graph-generators "graph generators".
 *
 * - \ref graph-algs
 *   <br>Contains various general algorithms for graphs, digraphs, clustered graphs. More advanced algorithms deal with
 *   \ref ga-connectivity "connectivity", \ref ga-sp "shortest paths", \ref ga-flow "flow", \ref ga-mst "minimum spanning trees",
 *   \ref ga-steiner "Steiner trees", \ref ga-augment "augmentation", and \ref ga-clustering "clustering".
 *
 * - \ref decomp
 *
 * - \ref graph-drawing
 *
 * \page getting-started Getting Started
 *
 * - \subpage build for information how to build OGDF
 * - \subpage porting for information about compatibility-breaking changes
 * - A list of @subpage defines
 *
 *
 * @defgroup basic Basic Functionality
 * \brief This module contains basic general functions and enumerations.
 *
 * @defgroup macros Useful Macros
 * @ingroup basic
 * \brief Several useful macros defined by the OGDF.
 *
 * @defgroup exceptions Exception Handling
 * @ingroup basic
 * \brief Provides support for exception handling in OGDF.
 *
 * @defgroup comparer Comparer
 * @ingroup basic
 * \brief Provides support for comparer classes.
 *
 * @defgroup random Random Numbers
 * @ingroup basic
 * \brief Provides random number generators.
 *
 * @defgroup date-time Date and Time
 * @ingroup basic
 * \brief Provides date and time utilites.
 *
 * @defgroup file-system Files and Directories
 * @ingroup basic
 * \brief Provides functionality for easy file and directory handling.
 *
 * @defgroup container-functions Container Functions
 * @ingroup basic
 * \brief Provides some commonly useful functions for general containers.
 *
 * @defgroup threads Multi-Threading Support
 * @ingroup basic
 * \brief Provides classes for threads and thread synchronization.
 *
 * @defgroup system System and Configuration
 * @ingroup basic
 * \brief Provides access to information about system and configuration.
 *
 * @defgroup containers Containers
 * \brief This module contains general container data structures and data types.
 *
 * @defgroup graphs Graphs and Embeddings
 * \brief This module contains classes for graphs and cluster graphs, including related data types.
 *
 * @defgroup graph-containers Containers Associated with Graphs
 * @ingroup graphs
 * \brief Provides various classes of containers associated with graphs.
 *
 * @defgroup plan-rep Planarized Representations
 * @ingroup graphs
 * \brief Provides specialized graph classes for representing planarized graphs.
 *
 * @defgroup graph-generators Graph Generators
 * @ingroup graphs
 * \brief Provides various graph generator functions.
 *
 * @defgroup graph-algs Graph Algorithms
 * \brief This module contains various basic and advanced graph algorithms.
 *
 * @defgroup ga-multi Self-Loops and Multi-Edges
 * @ingroup graph-algs
 * \brief Functions dealing with self-loops and multiple (parallel) edges in graphs.
 *
 * @defgroup ga-induced Induced Subgraphs and Cliques
 * @ingroup graph-algs
 * \brief Provides functions dealing with induced subgraphs and finding cliques.
 *
 * @defgroup ga-digraph Basic Functions for Digraphs
 * @ingroup graph-algs
 * \brief Basic functions operating on digraphs like testing for single source or sink, st-graph, bimodal.
 *
 * @defgroup ga-tree Basic Functions for Trees and Forests
 * @ingroup graph-algs
 * \brief Functions for testing if a graph represents a (free) tree or forest.
 *
 * @defgroup ga-connectivity Connectivity in Graphs and Digraphs
 * @ingroup graph-algs
 * \brief Provides functions dealing with connectivity in graphs and clustered.
 *
 * @defgroup ga-sp Shortest Paths
 * @ingroup graph-algs
 * \brief Algorithms for computing shortest paths in graphs (including single-source and all-pairs).
 *
 * @defgroup ga-flow Flow Algorithms
 * @ingroup graph-algs
 * \brief Algorithms for computing min-cost and maximum flows.
 *
 * @defgroup ga-mst Minimum Spanning Trees
 * @ingroup graph-algs
 * \brief Provides algorithms for minimum spanning trees.
 *
 * @defgroup ga-steiner Steiner Trees
 * @ingroup graph-algs
 * \brief Algorithms for computing Steiner trees.
 *
 * @defgroup ga-planarity Planarity and Planarization
 * @ingroup graph-algs
 * \brief Provides algorithms dealing with planarity of graphs.
 *
 * @defgroup ga-planembed Planarity Testing and Embedding
 * @ingroup ga-planarity
 * \brief Algorithms for testing planarity and for planar embedding of graphs.
 *
 * @defgroup ga-plansub Planar Subgraphs
 * @ingroup ga-planarity
 * \brief Algorithms for computing planar subgraphs.
 *
 * @defgroup ga-crossmin Crossing Minimization
 * @ingroup ga-planarity
 * \brief Heuristics and optimal algorithms for crossing minimization.
 *
 * @defgroup ga-insert Edge Insertion
 * @ingroup ga-planarity
 * \brief Algorithms for inserting edges into planar graphs with few crossings.
 *
 * @defgroup ga-cplanarity Cluster-Planarity and Planarization
 * @ingroup graph-algs
 * \brief Provides algorithms dealing with cluster-planarity and embedding.
 *
 * @defgroup ga-augment Augmentation
 * @ingroup graph-algs
 * \brief Provides algorithms for graph augmentation (e.g., adding edges to make a graph biconnected).
 *
 * @defgroup ga-clustering Graph Clustering
 * @ingroup graph-algs
 * \brief Provides algorithms for clustering graphs.
 *
 * @defgroup ga-orient Orientations
 * @ingroup graph-algs
 * \brief Provides functions for orienting graphs like st-numbering.
 *
 * @defgroup decomp Graph Decomposition
 * \brief This module contains data structures for decomposing graphs.
 *
 * @defgroup dc-helper Helper Classes for Graph Decomposition
 * @ingroup decomp
 * \brief Provides some helper classes that are used with data structures for decomposing graphs.
 *
 * @defgroup graph-drawing Graph Drawing
 * \brief This module contains data structures and algorithms for drawing graphs.
 *
 * @defgroup gd-energy Energy-based Layout Algorithms
 * @ingroup graph-drawing
 * \brief Various energy-based and force-directed layout algorithms.
 *
 * @defgroup gd-multi Modules for the multilevel drawing framework
 * @ingroup gd-energy
 * \brief Various modules that can be used in the multilevel drawing framework (e.g., placer and merger).
 *
 * @defgroup gd-layered Layer-based Layout Algorithms
 * @ingroup graph-drawing
 * \brief Layer-based layout algorithms such as the Sugiyama framework for hierarchical graph drawing.
 *
 * @defgroup gd-planlayout Planar and Planarization-based Layout Algorithms
 * @ingroup graph-drawing
 * \brief Layout algorithms for planar graphs and layout algorithms based on the planarization approach.
 *
 * @defgroup gd-ranking Ranking (Layer Assignment) Modules
 * @ingroup gd-layered
 * \brief Various modules that can be used as a ranking module in the Sugiyama framework.
 *
 * @defgroup gd-layered-crossmin Crossing Minimization Modules
 * @ingroup gd-layered
 * \brief Various modules that can be used for crossings minimization in the Sugiyama framework.
 *
 * @defgroup gd-hlm Hierarchy Layout (Coordinate Assignment) Modules
 * @ingroup gd-layered
 * \brief Various modules that can be used as a hierarchy layout module in the Sugiyama framework.
 *
 * @defgroup gd-cluster Layout Algorithms for Clustered Graphs
 * @ingroup graph-drawing
 * \brief Various layout algorithms for clustered graphs, as well as related functionality.
 *
 * @defgroup gd-helper Helper Classes for Implementing Layout Algorithms
 * @ingroup graph-drawing
 * \brief Various classes that simplify or support the implementation of layout algorithms.
 */
