seriesTransform-HistorySourceNode
This node is the single object available for identifying the source data for your transformation. It defines the data schema
for the information to be processed by the transform graph (most often a Niagara history).
Figure 42. HistorySource node
Unlike other graph nodes, this node does not have an input property displayed in the Wire Sheet. This is because the node itself is a data source and will use the node configuration to obtain the source data. Place the HistorySource node on a transform graph node.
Each graph may have more than one HistorySource node with each node defining a single input for the graph. You may provide the actual source at graph resolution time as a graph property. You must set the value of this property when the graph resolves. The property value can be set manually, by a program object, or by an interface, such as the transform chart binding.