GML2GV,GV2GML(1) User Commands GML2GV,GV2GML(1)

NAME

gml2gv,gv2gml - GML-DOT converters

SYNOPSIS

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

DESCRIPTION

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.

OPTIONS

The following options are supported:

-v Turns on verbose mode

-y Uses attributes according to yWorks.com documentation instead
of the GML specification.

-? Prints usage information and exits.

-ggname
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.

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

OPERANDS

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 CODES

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

LIMITATIONS

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.

AUTHORS

Emden R. Gansner <erg@research.att.com>

SEE ALSO

dot(1), libcgraph(3)

24 June 2011 GML2GV,GV2GML(1)