def get_doc():
    """Get documentation of this resource

    :return: rst string
    :rtype: str
    """
    return """
    The ``command`` model is used to represent a command in the monitored system.

    A command is used:

    - for the hosts and services active checks. The command is a check plugin
    used to determine the host or service state.

    - for the event handlers launched when an host / service state changes.

     - for the notifications sent to inform the users of the detected problems
    """
