What does the command 'SimulinkRealTime' mean when logging data with a file scope?

    When  logging data with a file scope in simulink, I faced a command named   'SimulinkRealTime', but I did't understand how this command produced. For example, there is a statement'tg = SimulinkRealTime.target;' in http://www.mathworks.cn/cn/help/xpc/examples/data-logging-with-a-file-scope.html, but this statement does not work when I tried to use it. I cannot find a command in MATALB HELP named   'SimulinkRealTime'. My question is what does the  command 'SimulinkRealTime' mean and how this command produced? 
Thanks in advance.

Answer 1

[Rajiv Ghosh-Roy]

The command is not SimulinkRealTime, but SimulinkRealTime.target. You should find this documented as well as in the MATLAB help.

[Xu]

Thanks for you reply, the command is indeed 'SimulinkRealTime.target', but there still no such command in MATLAB help. I believe commands 'SimulinkRealTime.XXX' all have closely relationship with 'SimulinkRealTime'.

[Rajiv Ghosh-Roy]

I do get output from both

help SimulinkRealTime.target

and searching for SimulinkRealTime.target in the documentation.