RhodeCode

The \c \@edges is just a synonym of \c \@arcs. The @arcs section can

also store the edge set of an undirected graph. In such case there is

a conventional method for store arc maps in the file, if two columns

has the same caption with \c '+' and \c '-' prefix, then these columns

can be regarded as the values of an arc map.

consists of two tokens, an attribute name, and then an attribute

value. The value of the attribute could be also a label value of a

node or an edge, or even an edge label prefixed with \c '+' or \c '-',

which regards to the forward or backward directed arc of the

corresponding edge.

  ///

  /// The columns in the \c \@edges (or \c \@arcs) section are the

  /// edge maps. However, if there are two maps with the same name

  /// prefixed with \c '+' and \c '-', then these can be read into an

  /// arc map.  Similarly, an attribute can be read into an arc, if

  /// it's value is an edge label prefixed with \c '+' or \c '-'.

  ///

  /// The arc maps are written into the file as two columns, the

  /// caption of the columns are the name of the map prefixed with \c

  /// '+' and \c '-'. The arcs are written into the \c \@attributes

  /// section as a \c '+' or a \c '-' prefix (depends on the direction

  /// of the arc) and the label of corresponding edge.