dylanede

// Need an endpoint to drive everything (provide top level criteria) - Nodes don't actually have the data going through them - only construct and modify callbacks

// Need an abstraction for a dynamically updating time serise - notification of points adding, updating and removing, refreshing - NOT a stream, kind of like a signal for multiple values in parallel

// Node - given criteria object, constructs a collection of output points, delegating where necessary
// criteria object may be modified at runtime - node should then modify the subscription
// Should be possible to have node sub-graph templates (maybe just functions) for generation based on changes in data source sets
// Internally to the graph, criteria may be dynamically updated at run time (e.g. to implement "join-on")

// Criteria: