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I reread the second part of the tutorial and looked the source code before performing exercises
and a more detailed research(study) of the code and would like to ask a few questions.
1. Why needed the node type contact? What role they play in the system?
2. Why needed the file resource_discovery.app ,how him get and where can read about this(If I right understand ,in “Erlang and OTP In Action”)?
3. And I would like to return to issue on the previous part from this reply.