Name of the attribute to modify.
            
 Declaration Syntax
 Declaration Syntax| C# | 
public string Attribute { get; set; }
 Remarks
 Remarks
            Valid values:
            "instanceType", "kernel", "ramdisk", "userData", "disableApiTermination",
            "instanceInitiatedShutdownBehavior", "sourceDestCheck", "rootDeviceName",
            "blockDeviceMapping" and "ebsOptimized"