We import Graphviz dot as translated to json. Here we do their one example which hints at possibilities. graphviz 
echo 'digraph { a->b }' | dot -Tdot_json | pbcopy
{
"name": "%3",
"directed": true,
"strict": false,
"_subgraph_cnt": 0,
"objects": [
{
"_gvid": 0,
"name": "a",
"label": "\\N"
},
{
"_gvid": 1,
"name": "b",
"label": "\\N"
}
],
"edges": [
{
"_gvid": 0,
"tail": 0,
"head": 1
}
]
}
http://hsc.fed.wiki/assets/scripts/import-foreign-json.html HEIGHT 240
Add code here to extract nodes and relations from _json_ and add them to _graph_. Remember node ids in _nids_.
json.objects.forEach(n => graph.addNode('Node',{name:n.name}))
json.edges.forEach(e => graph.addRel('Edge',e.head,e.tail))
digraph { layout = dot; overlap = false; splines=true node [shape=box style=filled fillcolor=gold] rankdir=LR node [fillcolor=palegreen] 0 [label="Node\na" tooltip="name: a"] 1 [label="Node\nb" tooltip="name: b"] 1->0 [label="Edge" labeltooltip=""] }