eventhandler onaddstream

onaddstream of type EventHandler
This event handler, of event handler event type addstream<http://dev.w3.org/2011/webrtc/editor/webrtc.html#event-mediastream-addstream>,
Hi all, Event handler is used to registered for certain event type
,but I am confused by above description in section 5.1.16.1 Attribute, "of event handler event type", in HTML5 ,there is no this kind of description.

I guess this want to express that
" onadstream of type EventHandler
This event handler, for event type addStream , must be fired.........."


Yang
Huawei