def value(value_info, label=None, desc=None):
    """
    Annotate the value information of the action being defined.
    @param value_info: the value parameter information.
    @type value_info: value.IValueInfo
    @param label: the parameter label or None.
    @type label: str or unicode or None
    @param desc: the parameter description or None.
    @type desc: str or unicode or None
    """
    _annotate("value", value_info, label=label, desc=desc)
Annotate the value information of the action being defined.
    @param value_info: the value parameter information.
    @type value_info: value.IValueInfo
    @param label: the parameter label or None.
    @type label: str or unicode or None
    @param desc: the parameter description or None.
    @type desc: str or unicode or None