Core is a completely modular system that would be deployed over a large Minecraft network.

Core is responsible for many things. Of it's modules, the main being "Core" itself, it divides up tasks like

• Storing information against users

• Managing user groups (by providing it's own group system) and permissions

• Dealing with channeled chat

• Sending information across servers (abstracted well so you can send many many kinds of messages)

• Storing maps across networks

As well as other complex functionality that would need to be used for a large network.