This implements a simple SCADA diagram, with animation of the flow along the pipes.
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{ "class": "go.GraphLinksModel", "nodeDataArray": [ {"key":"P1", "category":"Process", "pos":"150 120", "text":"Process"}, {"key":"P2", "category":"Process", "pos":"330 320", "text":"Tank"}, {"key":"V1", "category":"Valve", "pos":"270 120", "text":"V1"}, {"key":"P3", "category":"Process", "pos":"150 420", "text":"Pump"}, {"key":"V2", "category":"Valve", "pos":"150 280", "text":"VM", "angle":270}, {"key":"V3", "category":"Valve", "pos":"270 420", "text":"V2", "angle":180}, {"key":"P4", "category":"Process", "pos":"450 140", "text":"Reserve Tank"}, {"key":"V4", "category":"Valve", "pos":"390 60", "text":"VA"}, {"key":"V5", "category":"Valve", "pos":"450 260", "text":"VB", "angle":90} ], "linkDataArray": [ {"from":"P1", "to":"V1"}, {"from":"P3", "to":"V2"}, {"from":"V2", "to":"P1"}, {"from":"P2", "to":"V3"}, {"from":"V3", "to":"P3"}, {"from":"V1", "to":"V4"}, {"from":"V4", "to":"P4"}, {"from":"V1", "to":"P2"}, {"from":"P4", "to":"V5"}, {"from":"V5", "to":"P2"} ]}