Correct use of <xforms:submission> and <xforms:submit>

Hello everybody,
 
I just went through the XForms spec again and came up with a question concerning the <xforms:submission> and <xforms:submit> elements.
 
Section 8.1.9 "The submit Element" indicated that there has to be an attribute "submission" with corresponds to an id attribute of an <xforms:submission> element:
 
<quote>
    submission
        Required reference to element submission
</quote>
 
But reading section 3.3.3 "The submission Element" there is nothing said about an required id attribute. Even the example given doesn't show it.
 
So is that reference really needed? Or does the submit element refer to the first <xforms:submission> element per default, when those attributes are omitted?
Please help me on that.
 
With best regards,
Roman

Mag.(FH) Roman Huditsch (hRHU )
Developer .:. Information & Application Engineering
_____________________________________________________________________
hico Informations- und Kommunikations-Management Gesellschaft m.b.H.
TechLab, Thomas A. Edison Straße 2.
A-7000 Eisenstadt / Austria
phone: +43/2682/704-61-73; fax: +43/2682/704-71-61-10
e-mail: roman.huditsch@hico.com
mobile: +43/664/4102715