Convert a graph from
gvtogmlformat. Converters:gml2gv,gv2gml,gv2gxl,gxl2gv,graphml2gv&mm2gv. More information: https://graphviz.org/pdf/gml2gv.1.pdf.
gv to gml format:gv2gml -o {{output.gml}} {{input.gv}}
stdin and stdout:cat {{input.gv}} | gv2gml > {{output.gml}}
gv2gml -?