NAME¶
gml2gv,gv2gml - GML-DOT converters
SYNOPSIS¶
gml2gv [
-?v ] [
-ggname ] [
-ooutfile
] [
files ]
gv2gml [
-? ] [
-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
- -?
- 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)