1.1 --- a/lemon/lgf_writer.h	Thu Jul 10 16:05:56 2008 +0200
     1.2 +++ b/lemon/lgf_writer.h	Thu Jul 10 16:13:50 2008 +0200
     1.3 @@ -914,6 +914,12 @@
     1.4    /// It can be used almost the same way as \c DigraphWriter.
     1.5    /// The only difference is that this class can handle edges and
     1.6    /// edge maps as well as arcs and arc maps.
     1.7 +  ///
     1.8 +  /// The arc maps are written into the file as two columns, the
     1.9 +  /// caption of the columns are the name of the map prefixed with \c
    1.10 +  /// '+' and \c '-'. The arcs are written into the \c \@attributes
    1.11 +  /// section as a \c '+' or a \c '-' prefix (depends on the direction
    1.12 +  /// of the arc) and the label of corresponding edge.
    1.13    template <typename _Graph>
    1.14    class GraphWriter {
    1.15    public: