writeValue(graph, row, velocityIndex, vertex, DN.Vertex_HasVelocity);
writeValue(graph, row, flowAreaIndex, vertex, DN.Vertex_HasFlowArea);
writeValue(graph, row, nominalPressureLossIndex, vertex, DN.Vertex_HasNominalPressureLoss);
writeValue(graph, row, velocityIndex, vertex, DN.Vertex_HasVelocity);
writeValue(graph, row, flowAreaIndex, vertex, DN.Vertex_HasFlowArea);
writeValue(graph, row, nominalPressureLossIndex, vertex, DN.Vertex_HasNominalPressureLoss);