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
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 signifi-
cantly, the conversion is at best approximate. In particular, it is not
clear how multiedges are differentiated in GML, so multiedges are cre-
ated in GV with no user-available key. Also, no attribute information
is lost, in that any GML attributes that aren't converted to GV equiva-
lents are retained as attributes in the output graph.
At present, gv2gml does not support subgraphs and clusters. In addi-
tion, 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 <email@example.com>
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