Filters: Part 2: Thinking about the network as filter

When we think about a world where everyone is connected, where everything is a node on the network, where every node can publish and subscribe, we can understand the need for the stream/filter/drain architecture.

As mail became an enterprise utility, more and more of its collaborative function was corrupted, as signalled above. It could not be a trusted medium with functions like cc and bc in common use. There were other problems. Email was fundamentally a broadcast mechanism. Control lay in the hands of the sender. And there was no real cost to sending. Un... See more