The third concept to grasp is simply the idea of a 'this'.
The 'this' is the node you are currently AT.
For example if I am AT the Root node, then the Root node is 'this',
and all opertaions are being applied to the Root node becuase that
is the current 'this' :).
When you start an Interpret from the command line the 'this' you begin with is /Root/User and it is a CONTAINER.
When you connect to the webserver script with a browser, on the
interpreting web server, the SOCKET that has connected to it
is the 'this'!. Do not be concerned with what a SOCKET is for now,
it is merely a CONTAINER with more stuff in it :).
what this means is that 'get' is a valid function for both 'this's
and when a SOCKET is this, you can call say a 'write' function
because the current 'this' understands this function.