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       gml2gv,gv2gml - GML-DOT converters


       gml2gv [ -?v ] [ -ggname ] [ -ooutfile ] [ files ]
       gv2gml [ -?  ] [ -ooutfile ] [ files ]


       gml2gv  converts  a  graph specified in the GML format to a graph in the GV (formerly DOT)
       format.  gv2gml converts a graph specified in the GV format to a graph in the GML format.


       The following options are supported:

       -v     Turns on verbose mode

       -?     Prints usage information and exits.

              The string gname is used as the name of the generated graph.   If  multiple  graphs
              are generated, subsequent graphs use the name gname appended with an integer.

              Prints output to the file outfile. If not given, gml2gv uses stdout.

              The following operand is supported:

       files   Names  of  files  containing  1  or  more  graphs  in GML.  If no files operand is
               specified, the standard input will be used.


       Return 0 if there were no problems during conversion; and non-zero if any error occurred.


       As both the graph and graphics models of GV and GML differ significantly,  the  conversion
       is  at  best approximate. In particular, it is not clear how multiedges are differentiated
       in GML, so multiedges are created in GV with no user-available  key.  Also,  no  attribute
       information  is  lost,  in that any GML attributes that aren't converted to GV equivalents
       are retained as attributes in the output graph.

       At present, gv2gml does not support subgraphs and clusters. In addition,  there  does  not
       appear  to be a standard mechanism for specifying default node and edge attributes in GML,
       so any attributes are repeated for every node and edge.


       Emden R. Gansner <>


       dot(1), libcgraph(3)

                                           24 June 2011                          GML2GV,GV2GML(1)