graph = TinkerGraph.open()
g = graph.traversal()
//The nodes
curCharge = graph.addVertex(id, 1, label, "Topic", "name","Current")
pow = graph.addVertex(id, 2, label, "Topic", "name","power")
powFromNRG = graph.addVertex(id, 3, label, "Topic", "name","powerFromNRG")
NRGFromPower = graph.addVertex(id, 4, label, "Topic", "name","NRGFromPower")
powFromVI = graph.addVertex(id,5,label,"Topic","name","powerFromIV")
powInRes = graph.addVertex(id,6,label,"Topic","name","powerInResistors")
passSign = graph.addVertex(id,7,label,"Topic","name","passiveSignPower")
ohmLaw = graph.addVertex(id,8,label,"Topic","name","ohmsLaw")

//the pre-requisite edges
pow.addEdge("prereq",powFromNRG)
pow.addEdge("prereq",NRGFromPower)
pow.addEdge("prereq",powFromVI)
powFromVI.addEdge("prereq",passSign)
passSign.addEdge("prereq",powInRes)
ohmLaw.addEdge("prereq",powInRes)

//just some test queries
nL = g.V().has("name","passiveSignPower").inE("prereq").outV()
if(nL != null)
    println "Hey!"