xforms-model-construct, using events?

The specification says the following for xforms-model-construct:
"5. Perform an xforms-rebuild, xforms-recalculate, and
xforms-revalidate in sequence, for this model element. (The
xforms-refresh is not performed since the user interface has not yet
been initialized)."
[http://www.w3.org/TR/2006/REC-xforms-20060314/slice4.html#evt-modelConstruct]

Does that mean that
1) events are being sent, and the default action triggers the functionality
or
2) the default action is being performed directly

-- 
... Allan