Core groupprocesses open network connections to each other and use those connections to monitor and determine whether a process is running, stopped, or has failed.
核心组进程建立通向彼此的网络连接，并使用这些连接监视和判断某个进程是否正在运行，或者发生故障。
2
Although a product group can override or extend these processes, they get the full range of existing processes by default, without any extra work or maintenance.
虽然产品组可以改写或者扩展这些过程，但不需要任何额外的工作或维护就得到了所有已有的过程。
3
For instance, you might group together all code that processes XML into a higher-level object model specific to your application.