conditional send

Hi all,
	does anyone know how to do a conditional send in an xforms-ready event 
handler?

I've tried a few things - and a few things that I really wouldnt expect 
to work, but so far I dont have a solution.

for those that want to know why - I only want the form to load data if 
it needs to - and it doesnt need to in every case.

eg: -this doesnt work but you get the idea.

  <xf:action ev:event="xforms-ready" >

<xf:group 
ref="instance('formdefinition')/workflow/jbpm/@taskinstanceid!=''">	 	
<xf:send submission="loadtransitionlist"  />
			
</xf:group>
  </xf:action>

While I'm here I discovered what I would consider some inconsistencies 
in the xforms spec today.
with xf:load you can bind to an instance node in order to load a new 
page. but the same bind/ref attributes cant be used in the same way for 
a submission element. I really wanted a way to dynamically choose the 
url and params that a submision element would submit to (I wanted to 
submit the xml to that location) but couldnt find a way to do it. If the 
attributes were a bit more consistent in how they are used in the 
various elements then I think xforms would be a whole bunch easier to use.

Thanks
Jason.